First of all, it's in the self-interest of the writer to have him/herself understood. This isn't to please some
nagging English teacher of the past or one of your parents. This is quite selfish, to make yourself understood
as nearly as possible, for which correct grammar and punctuation are your honed tools of craft. I say this having
juggled, for example, to, two, and too, sometimes in the wrong place and occasionally it's and its (possessive).
Or just zoned out and done typos with the wrong word in the wrong place, or called a Canadian pipe a billiard,
etc. But exerting some effort, I generally do better.