Comfort doesn't have a lot to do with burnout or job satisfaction unless you're coming from a blue collar mostly manual job.
> many of us got into simply because it was a fun and engaging thing to do
That's one of the problems. For a lot of folks, it was exactly that 'was a fun and engaging thing to do' and then you get do it in the context of office politics, tight deadlines, need to sacrifice professional ethics and ship something half-assed because that's what the business needs, etc.. These things, repeatedly chip away at your happiness. Would you be more unhappy without the ergonomic equipment and all of that? Most likely yes. But ping-pong tables and the unlimited vacation (which is at the discretion of your manager anyway) doesn't always compensate for shit work or the nervous breakdown from having to sit on an incident bridge for 4 hours...
I need to admit, I love my job and I love this profession. But I do understand when people say it's draining.