If these formally uneducated men were writing, then what would a formally educated man be doing?
But writing wasn't considered a huge deal back then. That's why, again, there was a whole class of people who were scribes. That was their professional job, so who cared who could write and who couldn't.
I just don't get how, if Paul was still not seeing well, that would have affected his handwriting.
I read the verse in Galations to mean "see here, you can tell it's me who's writing this becuase you all know that I can't write very well. Look! here's my really crappy handwriting"
The reason I think it should be read that way is because there was a lot of Paul fraud going on at that time, with peole writing fraudulent (and sometimes Gnostic) things and signing Paul's name...this is his response to those people, in my opinion.
Probably teaching a Roman patrician's kids, since many tutors were slaves.