What as is another question but just being in the RAF would indicate a long interest in all things aviation.
That's a wildly presumptuous statement.
After leaving school I had a interview to join the RAF police - and had zero interest in aviation until 10 years later.
There are many clerical and administrative staff in the RAF who wouldn't know a thing about aircraft, then there are the cleaners, catering staff, motor mechanics, facilities staff (caretakers, building maintenance etc). There are likely more non-aviation jobs in the RAF than aviation-related.