Indeed.I find the so called sparks saying they have to replace RCDs or even entire fuseboards before they will make very minor changes, rather tiresome.
However, it's very unusual today to see any electrician talking about "fuseboards"
... and, of course, in cases like the changing of RCDs, the pockets of electricians who do the replacing - which very probably make a greater 'gain'than any of the organisations you menion.the only organisations gaining from the too frequently changing regs are principally the manufacturers selling equipment , followed by the training companies, the IET book sales and the CPS’s ...
Maybe, but I'm sure there must be a lot more information and hard data out there that I haven't yet managed to findi too have found it difficult to secure absolute clarity on the matter and from I see in the field most people just see a RCD and crack on ……. i suspect it’s been left very ambiguous so that nobody can be criticised