Wow, quite the extreme take there, and a strawman argument at that. I don't know why you think that the alternative to not living in a city is a life "in remote isolation with delusions of Swiss Family Robinson self-sufficiency". The original comment even specifically referred to suburbs.
Transit may be wasted time, but for the vast majority of people, that transit consists almost entirely of going to and from work. Living in smaller cities or suburbs means that your transit time for everything outside of work will be roughly the same as someone living in a big city. So, if remote work were to be the norm, the wasted transit time is eliminated. I for one agree. The idea that you and others seem to believe in where anything outside a major city is an apocalyptic hellscape that is "more damaging to adults or children" than anything else is not just melodramatic, its pure fiction, and like the OP, is a viewpoint I imagine is only held by a (very) vocal minority.