For other users information.
"Messages and articles should be brief and to the point. Don't wander off-topic, don't ramble and don't send mail or post messages solely to point out other people's errors in typing or spelling. These, more than any other behaviour, mark you
as an immature beginner".
The quality of the spelling or presentation reflects the professionalism of any organisation or association, presentation is important. Any user accessing this site and making posts who makes typographical errors when promoting professional associations should consider the implications of how this will be recognised once in the public domain.
It is inevitable that this will be pointed out and may adversely affect promulgation of said information to a wider audience.
This, more than any other behaviour marks you out as a consummate professional.