Sure; this happens, but it is just another side effect of illegal practices which become widely accepted, through endless repetition by interested parties
It is like owners/instructors of certain N European FTOs posting (anonymously) on ATPL-cadet forums, slagging off the DIY route, slagging off some cheaper FTOs in say Spain or Greece, and banging on about graduates from their (gold plated) FTOs being much more likely to get an airline job.
One has the same in avionics – example.
This sort of thing may be illegal but it is below the radar.
And it exists in cars (which should not be below the consumer regs radar) where most of the features of the CAN modules are not published (so software like VAG-COM has had to reverse engineer the stuff, by changing the config words one bit at a time and seeing what bit of the car behaves differently ) and this protects the dealer network because only they have the right software. This was particularly illuminated with the diesel engine ECU cheat scandal; most N European makers were implicated but VW took most of the heat for it.
In the US this was addressed quite nicely, many years ago, by forcing IBM to publish most of their internal interface and protocol documents, as a condition of doing business with the US Govt Try that in Europe!
Anyway… digressing
I wonder if those CPL syllabus pages posted by Dimme are applicable to piston GA? TPs and jets, certainly.
What this shows, yet again, is that European pilot training is in two distinct streams:
Bathman is having a moan that the 2nd stream above has not been taught about piston aircraft ownership, maintenance and operation. The incentive to teach that stuff – to either stream – is absolutely zero Especially as the piston charter business died some 20 years ago.