What's being "forced"? And what boundaries aren't being respected? If someone attempts to strike up a conversation and you're not interested, you can signal that. Or just be direct and say you don't feel like talking. Sure, that can be uncomfortable, but you can't expect humanity as a whole to repress its social nature just to spare you occasional, fleeting moments of mild discomfort. (And despite the wide spectrum of social inclinations -- I'm definitely on the introverted end -- I think it's accurate to say that humans, as a species, crave social interaction.)
In your ideal world, how would someone even signal they are a "willing participant" without talking to someone?
In your ideal world, how would someone even signal they are a "willing participant" without talking to someone?