Of course, it's a very important point and teaching it to Newbies is very beneficial for Bitcointalk because many Newbies still don't know. 
Not only newbies, to be honest. ...
But I suppose many forget that those newbies eventually become members, full members and even higher, but they still don`t know a lot about forum policy and continue to write low quality posts even though they are not newbies any more, at least technically speaking. That is why I believe that advice for improving quality are useful for everyone despite forum rank and activity.
You have written in our German loacal board as well and despite that you are not from Germany, your posting quality from a spelling perspective is often better than the average (old member) low-effort poster in our local section.
It is really a lot about willingness to lern, where many old members needs a reminder. Hopefully, our campaign will be the reminder.
@1miau: please don't forget also to add to OP zasad@'s translation.
Looks like I've forgotten to add it. It's now included in our OP.