Yes, retro is quite correct. Using a phone - particularly texting - poses a far greater threat to safety that somebody a point or two over the alcohol limit.
This increase is not sufficient as a deterrent. An additional point makes very little difference to most people. In view of the danger posed, the offence should attract a mandatory ban of at least six months, increasing considerably (as with Drink Driving) for a second or subsequent offence within ten years.
But the greatest problem of all, as mentioned, is enforcement. Prevalence of the offence is rife and probably even more so than speeding. I don’t think cameras would work. They need to be able to identify the driver unequivocally and not much of the kit around can do that. But covert detection is not, as suggested by douglas “entrapment” or even sneaky. No more sneaky than hiding in the bushes to catch a burglar.