Imo, and it's a limited one I admit, but it all comes down to how some people "Help" others.
Correcting spelling and grammar of someone that hasn't asked for that help is pointless, all it does is annoyed, it doesn't teach anything.
Helping anyone that hasn't asked for it usually ends in annoyance. How many women in this thread have been "Helped" by a random man explaining things? Or how many have been Helped by having men offer to do things when you're perfectly capable yourself?
Why are some people so against mansplaining etc but are perfectly happy to be self appointed forum and grammar police?
"Help offe'd and took in good meaning, is valued o'er help not asked but forced upon." - Edmund Alan Warboise - 1899