Sloppy use of version control doesn't make you more effective. It just doesn't work that way.

Torvalds himself writes up proper commit messages even for his toy projects. [0][1] I really doubt it takes him much time or effort. You really think he's not pragmatic?

[0] https://github.com/torvalds/GuitarPedal/commits/main/?after=...

[1] https://github.com/torvalds/test-tlb/commits/master/