I get what your saying I think OP and to a certain extent i agree. Working is rarely flexible and family friendly, e.g supermarkets and shops used to have week workers and weekend mostly separate, now its all 4 day shifts and zero hour contracts . People having long commutes meaning they are further away so miss plays, assemblies, bed times. Weekend work for parents is more common. Summer holiday split holidays to stretch the holiday allowance to cover childcare mean both parents don't get to spend family time. Both parents needing full time work to just exist. I do think it then puts a stress on relationships as everyone has to pull their weight all the time with every day life having to be organised with military precision.
Its not a great treadmill to be on, the choice of having a parent home is slowly going and i don't think its best for everyone.
I also think theres another element on the other spectrum where we have to live further away , from our parents so in their old age we won't / aren't about to help them, include them in family life so add to the lonely epidemic . Not to mention all the issues of shift work, holidays as mentioned above. It means there isn't the early intervention when they just need a little more help with shopping or doctors appointments.
I blame two things, house prices and less secure jobs. As mentioned by a PP the 'super worker' means you need to feel irreplaceable and that comes at a cost somewhere. Where you would have a job for 30 odd years, that doesn't happen now.
As for the mums on their iPhones, i can remember my mum spending hours on the home phone talking rubbish to everyone (when i was really little it was only after 6 as that was when it was cheaper) just being ignored, so its not a new thing its just we can take them out with us now. I do have to give my OH a kick when he's out with us sometimes as he's quite often glued to his phone and sort of 'absent' from the day even though he's physically there. That makes me sad.