Like Brisket said, there definitely is an ethos to change. I don't think you can mandate it. It has to be a case by case basis. There have to be limitations. There can no longer be any jobs without paid sick leave, but I also don't think that amount should be unlimited if its the type of job that can only be performed in person. Something like 10 no questions asked sick days. Anything more or less can lead to abuse, doubts, questioning, resentment, etc. I once had a job where they just said we don't have vacation or sick days. You get four weeks off, use them how you need them. Beyond that, you don't get paid.
On the flip side, if I've flown in for a "heated dispute negotiation" with one shot to work it out, I do expect my attorney there unless he's on his deathbed. And I imagine he expects himself to be there. That's just the competitive aspect of business and key players on a team. Lots of the time, there's isn't a wait until next week to close the deal, sign the contract, make the sale, etc. Similar to sports. If Quentin Ewers has a normal cold next year OU week, its expected that he will practice and play through it. There is no maybe we can reschedule.
Those are ethos I don't see changing, and I personally don't want to change. In those cases, everyone kind of agrees to accept the risks.