"for what?" I don't think you are a measure of what is meaningful for other person and what's not. If I choose to work 12 hours it's my free choice, not affecting you, and I may have my own reasons.
If I don't want to do so I will find another job. If there are more capable people like me employers will have to change conditions to attract talent. But I won't modify my reasons to other peoples ideas about what is meaningful and what is not.