I'd guess because they have nothing to prove.
"Look, world, I care so little about being dumped, I don't even need to make an effort. Plus, I've got brains and more money than I can count."
Next level: Bond villain.
if you could read my comment then i've proven my point.
posting from a windows laptop and Firefox, i get no autocorrect for grammar like capitalization. only firefox was detected as a work that needed to be capitalized.