In all seriousness I feel much of the issue is that this is a particular medium, ie an online forum. Said medium inherently involves typing, spelling and written communication.
If one cannot be effecient or effective in the written word, communication suffers.
Now it's true that a picture is worth a thousand words, and if people prefer to post pictures with brief descriptions that can also be very helpful.
In the end the point is that maximum benefit is derived from clear and concise communication, and in a forum such as this that requires proper grammar and spelling.
This can be considerably different in a shop environment where one is being shown how to perform a given task "hands-on." Here, sitting at keyboards, we are not in such an environment.
Arrhhhh... can't resist.... its a full moon... meds wearing off... Bull . please help me , delete this post if I step over the line... Ohhhhh !!!! PAIN !!!!
Wow, just love these internet armchair experts... no offense, I am agreeing with you if that is what you think you are .
Well, if I was to be super-critical I could say that your post was less efficient with the English language than it could have been , especially given that you were trying to set an example to all us dumb guys on GJ
uhhuhh.. Thank goodness you are not a moderator or something significant ! Good to know that we can all have an opinion.

I respect your right to be exactly that, whatever it is !!
Yes, I do agree- when I am sitting at my keyboard, I am not in a shop environment. I must confess, I am not sure what this relates to ??
following your reasoning.. "When I am not on a train, I am not in such an environment as when I am on a bus" . Even Nietzsche was not so adventurous but what would he know ??
Just FYI, but I do not see the need to explicitly define typing vs written communication in your monologue. Said medium ? Who said ? I am sure you mean "Aforesaid". Actually, in all honesty I do not think you knew that was what you meant ....I am not at all sure that typing is a medium, being a verb and all. I rest content to my dying day that spelling is not a medium.
"and in a forum such as this that requires proper grammar and spelling. " If I was to agree to your premise, I would also urge you to firsthand personally meet the stringent criteria that you have proscribed for the rest of us to follow......
Sheesh... I just want to know how to weld something , not spell Missippipppsssiiisssppsssiii ... whatever .....

if I thought it was important , don't you think I'd google it ???