Does humanoid convergent evolution imply similar average stats? ie, if we take an animal and we force it down the evolutionary line towards being humanoid, would the changes that are made make them have roughly the same IQ, Strength, Agility, Constitution. Or would they maintain higher strength...
Another way to look at it is does the human shape and physics dictate that a humanoid beings (including machines) must have a similar average ability in the various ways we can measure them.
Yet another way to think of it is would a dog-shaped reptile/cephalopod/insect/mammal/robot be more dog or be more reptile/etc
The following is my thinking, explanation, and purposes... The above question is what I want answered even though the below poses questions as well, they are in pursuit of the above.
Purpose: I'm trying to create a Tabletop RPG game (and novel) and I'm trying to come up with an easy way to balance that is realistic. It is obvious that if all types converge to an average then this becomes a lot easier.
The types that are potentials it seems to me are;
Mammals | Reptilians | Cephalopods | Insects | Androids
The main stats of consequence are;
Strength | Constitution | Agility/Dexterity | intelligence
STRENGTH - It seems that according to research that Reptiles can produce something like only 20% of the strength of mammals. And on the other hand Humans aren't particularly strong mammals with felines able to output strength at what would be superhuman levels for the same body weight... Insects on the other hand seem relatively strong, wouldn't be able to exist at humanoid sizes due to the lack of strength. It seems to me that an insect would have to evolve to have some sort of strength for it to makes sense, while reptiles might not need to evolve strength to match Humanoid levels. Where as we see humans vs other apes there is a large strength disparity which implies a large loss in strength so any mammal that evolves to be humanoid would be significantly weaker than their animalian kin.
CONSTITUTION - Has to do with Sleep, resistance to infections and damage. From what I know Humans are said to have a very good natural immune system compared to most other animals and many "intelligent" creatures seem to have similar sleeping patterns which seems to indicate that as species becomes more intelligent it needs a more humanoid sleeping pattern. While I don't know of any correlation to infection/physical damage resistance, although might it be that high resistance promotes intelligence in some way? Or perhaps because of our intelligence we are able to treat things better thus increasing our exposure to things which causes resistances to more readily come about and then get past on?
AGILITY - My main worry here is Insects have quite fragile bodies and thus would move slower. Likewise Cephalopods have many limbs and thus might be less agile. The evolution for strength in insects would definitely increase this, but to what extent? Wouldn't an exoskeleton still causes restrictions? For cephalopods, if this is the case then wouldn't that mean loss of limbs?
INTELLIGENCE - Intelligence is largely derived from the ability to provide enough energy to supply a more intelligent brain. It seems then that intelligence is capped at human maximum and if you are going to evolve into a humanoid shape you're going to have to learn how to cook to provide energy for increased brain functionality. Doesn't this mean then that any species that comes up with cooking and is humanoid will just become as intelligent as humans?
I've neglected in the above to talk about androids, which is a similar problem. There seems to be the problem that androids would have maximal strength, dexterity, constitution, intelligence, along with a whole host of traits that we can only dream of, but I question, if they're humanoid and they are working within the same realms of energy consumption would they not have many of the same limitations. Their energy would be limited and their CPU would only be able to process so much, just like our brains. And likewise, if we want light androids wouldn't that also limit them making their average to the above stats very similar to ours? with mostly the same abilities? I mean we could but femtoscopic infrared vision eyes in an android, but that would take space in the skull and the processing ability which seems like it would be considered not all that useful and would be bulky, thus discarded. In the end wouldn't they then just average down to the same statistical averages as biological life forms? Maybe a bit enhanced to optimal, but still limited to what a peak humanoid would be able to do?