Because of their complexity however.......if they malfunction.....parts are 'unobtanium'....and they often cannot be repaired.
This is Halcro's original premise and sadly I now have personal experience confirming its truth.
I longed to live dangerously so I bought a mal functioning tt101 with the idea that it could be fixed, a la Lewm's proposal, by a 'trained professional'. It could not.
The 'cannot' in the depressing sentence 'Your Victor tt101 cannot be fixed' is not, however, metaphysical. A trained professional with loads of time, resources and good will can probably fix such a machine, but such a person, if such there be (the guy who runs www.amp8.com is probably one such person), will need to charge a fee disproportionate to the value of the table. So, for all intents and purposes it is dangerous to live with these tables, well, at least the tt101.
So, Halcro, I have to withdraw myself from the 101 club before even attending the first meeting.