Wrong spellings, grammatical errors and wrong punctuations can utter the message we are trying to pass across. Most of us here only adopted English language as a second language.
We are not perfect.
In other to be perfect some people intend to make use of AI to make everything better and perfect, is not really encouraged and if some members continue using AI they won't improve in there grammar and spellings.
Sometimes the messages you sending across can be misunderstood by the reader not because you made any grammatical error but they read it wrongly and had that different understanding to what you said, and it will make you feel like you went wrong somewhere. That's to say that errors doesn't only occur from the writer but also the reader too.
In order not to utter the meaning we had in mind, we must preview, read again and again, then post! We should not forget to follow up our posts. You might come back to read the post you made 5 mins ago and spot an error. Especially for us that our mother language tend to interfer with our grammar. Fortunately, there is an 'edit' option. You still have another chance to correct the mistake(s) you made earlier.
You can preview your post 100times and sometimes you won't be able to get that error you're looking for, it would be later on when you've finished posting maybe some hours later that's when you see that error you were looking for.
Posting has to do with the mind too because you can say you typing
"I'll be waiting for you" but when posting you'd noticed that you typed
"I'll waiting for you" shit like that happens all the time.