i believe the CAA staff will always have seminars because they know it will provide them with cudos and extra income in retirement.
The last seminar I went was taught by one ex-ETPS test pilot turned FIC, one ex-Concorde pilot, and one ex-heart surgeon turned CFI. None worked for the CAA, and certainly none needed the income..
I also found the content highly relevant! Some of the presentations were on GPS approaches and the latest EASA missives, for example.
Prehaps you guys are going to the wrong seminars