It's also not true to say that it's a specific profession being singled out. I'm a professional software engineer (my colleagues may disagree, but it's what I write on my CV) with a PPL, but, as far as I'm aware, I'll still be subject to the same laws as commercial pilots when I decide to go flying. (The difference is that if I'm feeling a little hung over and choose not to fly, I don't have to worry about loosing my job.)
FFF
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