This is overstating the case. In the US you can buy such devices (usually from Aliexpress but Amazon has devices capable of some jamming/deauth). They are illegal to use for intentional jamming of other people’s equipment. However, unless you go around jamming important safety equipment or making local hams angry then nothing will happen. The FCC has its hands full and can’t even seem to address persistent issues on the ham bands until they get really bad.