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.
Except that as a very learned man, Paul would have been a good writer.
As demonstrated, many people could write.
The scribes were professionals....similar to printers in our day. They did the "official" copies.
The evidence for Paul's eye problem being the "thorn" includes these ASSUMPTIONS:
1. Injuries to his eyes from beatings.
2. The use of "large letters" in Galatians as an indication of eye problems.
3. The blindness caused on the Road to Damascus.