So basically, if he hadn't added the comma, he'd still be at college.
So he got kicked out because of an extra comma, which he added to make it even more edgy, at the cost of reducing plausible deniability to nearly zero.
I’m not sure which college was involved here, but if I were the person adjudicating this, I imagine the outcome would not have hinged on the comma.
Well, without the comma it can be entirely plausibly framed as a nice statement, no?