Well, humans are also extremely error prone. Spell check, IDE helpers, delinters, automated testing, etc, all help check that things are correct automatically,

Well, humans are also extremely error prone. Spell check, IDE helpers, delinters, automated testing, etc, all help check that things are correct automatically, which saves huge amounts of pain. I personally would always put more faith in someone who carefully checks their work than someone who thinks they don't need to. The second person is making mistakes and just doesn't realize it.