They were often quite resentful of people who showed up, worked hard and got results, but who didn't hang around for the social interaction game as they had other things to do with their free time.
The real problem with academics (at least for me) was the lack of any real academic freedom - working 24-7 on something and making sacrifices towards a goal you think is really useful and worthwhile is one thing, but doing it just because there's a pool of funding available for something? That's not worth the bother. In that case it's just a job, a means of earning a living doing some tedious repetitive work, and why spend more than 30-40 hours a week on that?
Academic funding is all controlled by government bureaucrats and corporate executives, and maybe some politicians with special interests, and if they're not interested in supporting research into your field of interest, you might as well forget about it, unless you can finance a million-dollar-a-year research lab on your own. I suppose it's possible, but not very common.
Regardless, not many people seem to end up making money doing something they really care about, unfortunately. Overwork and risking burnout might be part of the price you have to pay to get there, at least in our rather dystopian modern American society. (Notably, the author of this piece relocated from UK to Norway...)