Does your mind really function this way? Deflect all challenges with insults to intelligence and vague airs of intellectual superiority?

We can walk and run, but our walking and running mechanics are built for persistence hunting. Is that the most useful way legs can be designed? What if we want something that can move faster? We certainly cannot fly or swim or dig very fast, which is why we use tools to get around those limitations. Wouldn't those be useful functions? Are our human legs compatible with a design focused around having those additional functions?

We can certainly go up stairs, but stairs are a human construct built to suit our human needs. Why walk up stairs if you can fly or stick to walls?

Dexterous manipulators.. See, the thing about fingers is they're pretty big at times and pretty small at other times. Wouldn't it be more useful to have variable manipulators that can change size? What about a manipulator that can soften to mould around/inside an object being grabbed and then harden once the desired shape is reached? This form of manipulation would essentially be an all-purpose screwdriver, among many other things.

Is the human hand REALLY that efficient at manipulation, or is it the best that we currently know because we haven't spent much time thinking about it?

Humanoid robots fit right into existing infrastructure, true. You know what else fits right into existing infrastructure? Cats and dogs. They also have the advantage of being much smaller. They even have limbs, too! Past that, though, we don't need to be confined to building copies of animals.

> Billions of years of evolution can't be wrong... or can it.... Only a redditor could suggest otherwise haha

This is pure brain rot and shows a failure of understanding of what the process of evolution is. Human-level sentient species could theoretically have come about any number of ways, and those other ways could theoretically be much more effective and well-equipped at navigating our current human society than we are. We aren't a species that is perfectly fit to our environment, we are a species that passes the bar of "Bare minimum for perpetuation within an environment". And even then, we have no idea if our ability to perpetuate ourselves will extend any further than it already has. You are making a lot of assumptions here.

The way I see it, you're out to prove your intelligence on reddit for some reason. I hope you find what you need because constantly comparing your own competence and intelligence to that of other people isn't a good place to be. Ask yourself why you value intelligence so much.