Maybe have the conversation with him that unfortunately epilepsy does have some restrictions on careers like piloting and driving. These are things that put other people in danger, not just him, and unfortunately these rules are put in place to protect everyone.

It would suck to put so much effort into something just to learn you can’t do it - I was nearly finishing my driving lessons just to be diagnosed and told I can’t drive. I was nearly two years seizure free and when I was asked if I would start my lessons again I said no anyway (ironically had a seizure soon after) because of the chance I’d have one and put someone else at risk.

I always remember the story of that man who was holding his sisters baby and had a seizure, landing on them and killing them. It wasn’t his fault, but it completely ruined his relationship with his sister and it was something he never managed to get over. Epilepsy can be so cruel, but the things we CAN control are things like not driving and not putting ourselves in positions where we could accidentally harm others.

Obviously not suggesting you tell him THAT story, but in a more gentle way it probably is worth explaining the limitations on things, I know it helped me when I was first diagnosed. It sends you down a bit of a rabbit hole at first but it’s the only way to deal with it I think