Because the RSGB is run by tedious atavistic old farts, who want the hobby to be an Old Men's Club forever. Meanwhile Ofcom's unofficial position is that they

Because the RSGB is run by tedious atavistic old farts, who want the hobby to be an Old Men's Club forever. Meanwhile Ofcom's unofficial position is that they literally cannot be paid to investigate things that happen on the amateur bands, and don't much care what you do anywhere else as long as you're not making a nuisance of yourself.