Big profits for the manufacturer, and incremental disarmament of the civilian population.
Making this kind of feature mandatory on all civilian firearms is the next step. Prohibiting the sale or possession of unauthorized firearms without this mandated feature is the next step after that.
Firearms so equipped will be useless for anything other than simple target practice. And they will be triple in price to the older firearms. All of that is intentional.
"It's for the children".
“What’s the bottom line?”
As you say, disarmament, mandatory for gun owners, pretty much the end to our Second Amendment society.
And what are many conservative gun owners doing - sitting on their butts and REFUSING to vote for Republicans in November elections, because so-and-so Republican is a RINO.
So don’t come crying to me when the Democrat-packed courts simply DECLARE that the Second Amendment was a mistake and no longer applies, because once they have the votes on the courts, that’s what they will IMMEDIATELY do.
And don’t bother telling me you won’t give up your guns - the gun-grabbers won’t care, as they’ll know they can lock you up for 10 to 20 years if any cop gets a whiff of your now-illegal gun, such as after a self-defense shooting, at the range (or your backyard), on the table when police show up for another reason, an ex-lover or your kid/grandkid/friend ratting you out, etc.