The military talks about 'embracing the suck'. Some people like to trace this focus on work and the grind to the US's puritan roots.
I think learning to be ok with the grind is one of the biggest life hacks a person can make. Whether it's eating healthy, exercise, or shipping your startups first product, there comes a point where it's grind - almost every single time.
There is a danger of falling in love with the grind and losing sight of why. As long as a person keeps sight of a goal, grinding is skill to help get them there.
Accepting the grind is a skill can be developed. Carmack talks about wrestling and then grappling which is an absolute grind. I developed the skill through sports and powerlifting, and now I also train Jiu-Jitsu. There's very little at work that moves my emotional needle anymore.