That's undoubtedly true from the point-of-view of an electrician etc. However, I doubt whether a lot of their customers would be so happy with the idea that things like JBs had to be 'in plain sight'!Nobody has (that I've noticed in this long thread), the main issue - which is how might anyone even find a JB, which was in an accessible place, though hidden from obvious view? Finding one, under a floor, and a carpet, would be much, much more difficult. So in my opinion, a JB should not only be accessible, but located where it could be easily found.
The other point we often mention which makes this whole discussion a bit moot is that if someone installs something electrical which is not "accessible for inspection and testing", then no-one is ever going to know what, if anything, has been installed
