

This, anyone with strong glasses would be disabled in the stone age, lol. Needed some surgery before? You’d be dead. Ever broke a bone? Likely dead.
I went through my whole (living) family tree once and I’m pretty sure none of us would have survived, including me.
Where you intend to stay is part of the questioning when you enter and they can get quite suspicious if you don’t have a plan. Source: An Austrian, white friend of mine who went to the US. He also just wanted to travel around but was warned in advance (by other, mostly white europeans) that he shouldn’t state that when asked. It’s just not worth the risk.
While that’s not the same as having to show hotel bookings for the whole stay, it is a thing travelers have had to worry about for quite some time now. I’m sure it’s worse and more complicated for anyone of color.