The trick is to not care enough about your job to get hurt but not care so little that you could short-term be hurt.
In many places if you get hurt/burnt out on the job the upper seats are looking for any reason to curb stomp you. There's no reason to give a company your all unless you have an actual stake in it or they are there to hold you up when you're dragging. I've worked at multiple places where influential people died, yes dead, below average life expectancy, - on the job - and corporate did everything they could to not even pay out on their legal obligations (life insurance, D&D). In some cases employees joked or snickered about the person who died later on - in meetings.
In tech. I've found that you're not on your own but you are at the mercy of who is in charge of your schedule and rates your performance. If you lose trust in that person your best option is to leave as quickly as possible. Otherwise they will do what they can to destroy you for as much 'profit' as they can claim. Being clear. It is not about realized gains, it could even be at great detriment to a company. It is about short-term line item claimable gains. "We got 4 good months out of her...", "they were terminal and now they will be working somewhere better for them...", "he really wasn't closing as many tickets as the rest of the team...", "they weren't helping as many team members as the rest of the team...", "we never needed someone with an advanced degree...", etc.
Check in with yourself regularly. Know the signs of burn out. The company you work for does not depend on any person caring about you in the slightest.