You focus on the commute and are ignoring the actual job productivity (as measured by innovation and quality)?
Another way of looking at this discussion is this: you are reading posts from a lot of people with experience, life experience (or as you would call them, boomers) who might know what success looks like. Sitting at home working isolated from all other people is not that. You can blow them off all you want, but then you have to accept that most of your paycheck goes to rent and food, due to real estate inflation and price inflation that comes with your new lifestyle.
What comes across from the WFH crowd is they want an improved quality of life that comes with working less stressfully, but at the same time think they can keep their overall quality of life living in their community that has so far existed with an abundance of everything. You can't have one without the other. If you want high QOL you have to work for it or bring a level of talent that can't be easily reproduced.
SOMEBODY has to work hard to give us this quality of life. The WFH crowd is basically saying it should be someone else, while they get to enjoy the best of both worlds. You are hearing people telling you that's not possible, because it is just not sustainable. WFHers believe they can be just as "productive" by some metric. But by not contributing to the bigger team/community/neighborhood they are simply a leech, because they are only helping themselves, not others via the soft effects of their work. A small taste of real world examples are having to pay for parking, which employs a parking manager, paying for your soy oat latte which employs someone who has to make it just right for you, etc, etc etc... Maybe while at work you realize you left your glasses at the coffee shop and race back to get them before they are lost. While racing there you peel away 1mm of extra concrete from the roads, so there's another job for someone to repair that road. The list is endless.
Look at the absolute mess WFH and leeching off the economy has done to the real estate market, commodity market and even more tangibly the car market.
Making predictions is always impossible and almost always wrong. But it does seem the WFH are entrenched at this point and standoffs like this would continue. In that scenario, I would expect QOL in America to significantly drop over the next 5 years (with the requisite of blame XXXX political party who in power) as quality and innovation continue to drop. Some of those pieces will continue to move offshore to never return. The other scenario I am hoping for is WFH gets cut to a small % and people resume back to working in teams for a greater good. And don't forget, when people tell you that you are working for some fat billionaire, its wrong, you are actually working for your community, every $ you bring in diffuses all around the country. There will always be billionaires, but that's not where the majority of your work actually goes.