Well, there's no need for a medical for most aeronautical engineering jobs - and many of them are absolutely fascinating (I've done more than most).
If you don't have the aptitude to pass an engineering degree (or prefer to work more manually) you can, if you have the aptitude for that, look at working as a licenced engineer.
If you can hold a DVLA/NPPL medical then you can become a microlight instructor professionally - it won't make you rich, but I know a lot of very happy microlight instructors with a lot of flying hours between them.
I suspect (I'm sure that you can look this up) that it's also possible to become a commercial balloon pilot.
Your options have been limited, but not eliminated.
G