Because Amateur Radio is now seen as an old male white (in the UK) pass time that doesn't really add any to society. As the world is going wireless their is greater pressure on the resource which is spectrum. When making decisions regulators look at the benefits that new technologies bring compared with what is the value of the current use e.g. to serve the growing demand to provide data to consumers versus a few old people swapping QSL cards and chatting about what they did yesterday - I wonder which one will win the argument. Also note that the amateur bands are usually harmonised on a regional or global level making it a lot cheaper for manufacturers to build equipment (hence the recent France proposal on 144 MHz).?
