Some interesting points (including the silliness) but I'd have to say that in the 40ish years I've been around it all that there's only two key fields I know anything of depth about; Mentalism (including Bizarre) and Grand Illusion. They are the only two areas I've ever worked in at any extended level though I do have more than just a bit of background in Escapes and a very limited bit of experience doing Close-up... and I'll add, nothing overly spectacular, just very basic stock stuff.
There are areas in magic I deliberately don't want to know much about though, mainly so I can still be mesmerized by them. This is especially true with Close-up but likewise traditional stage manipulation acts. Where I do know some of the inner-workings it's just not my field and thus, I don't put too much time into it out of fear of overload.
The majority of the full-time working pros I know more or less follow this same course, having little time to invest when it comes to learning "the rest of it". I remember Kirby Vanbirch who at the time was a 28 year veteran to magic, had no inkling that something like Mentalism even existed before he met me. He was a major stage performer and nothing other.
But yes, Magic is a nasty mistress that can be quite demanding at times. It's best to be cautious or she can eat you alive.
