Some people need the office social life (nothing wrong with that). Many others don't.
As for connectedness....people can feel plenty connected working from home. Their connections are simply not work connections.
For example....my wife often has a friend over for tea at lunch time or in the afternoon. She takes the dog for a walk a couple of times per day and says hello or chats briefly with neighbors on our street.
As for work/life balance....much easier to maintain when you're not wasting a couple of hours per day driving back and forth to work. Also easy when you have a dedicated room at home for work and when you're not in that room, you're not at work. Now, my office is also my "household office" (take care of bills, etc.), so I do use it for "other things". I even have a sofa bed and TV in there. It's my personal space.
Not too sure why you associate working from home with door dash, but, uh....people are different I guess. I also ordered plenty of stuff from Amazon when in an office cubicle. I mean, why not? When I get the idea to order something, it's not like I'm gonna wait until I get home. I might forget by then.
Working from home is also so economically advantageous for the employee! No time/money on a commute. No money for work clothes. No time wasted getting ready for work or "decompressing" when you get home. No money wasted on lunch out.
It's good for pets! Our dog is much better off with us around all day.
It's better for home security....the house isn't sitting vacant all day, waiting for someone to break in.
It's better for package delivery.
It's just better!
Maybe it isn't for everyone. But it certainly is for us.