Looking at your original message again OP as the thread got me off track a few times. I think there are many valid points here along with a very wide range of experiences and opinions.
I also sometimes wonder about your last point / question, and I certainly think about it in a slightly different way to what's mostly been covered in the thread. Partly because I don't think there's a right and wrong answer - things are different today than any other time in history, and so has every other era been. If we look back, every generation / era was plagued with concerns of something along the lines of "we're now more isolated / rude / overworked than before". It's all relative as others have said.
There is much out there in the way of this discourse, how current expectations could be considered greater than other times / generations and there have been significant changes to lifestyles from a range of inputs. I think there are many different types of hard work as other posters have said (and one is not better or more righteous than another), and there are also many societal shifts and developments of all kinds that make our lives complicated, many of which are complexly and intrinsically linked.
Some of this was covered in Celeste Headlee's book Do Nothing which helped me with perspective on some of these topics, and things like Project 333 helped me focus on the simple things in our control that make life simpler and more straightforward - but these things won't appeal to everyone, I know.
I hope that you get to a better balance, and feel assured that there is much you can control.
Lastly, MH is clearly a hot topic. I do think those of us with the greatest resilience would do well to support others with empathy, as when the moment comes and you have to accept or come to understand your resilience is not "fixed" and does in fact know some bounds, there may not be many people ready or willing to help if you've used your resilience as a bar to measure others by when it's a deeply individual and complex characteristic.