The signatories of this (letter, petition, whatever) are the same folks who profit from creating this Pandora's Box. If you don't want it opened, stop making it?
Not all products will get abused, there’s better tools already (like matches/lighters/etc) or there’s just no good abusive use cases. Some products are just begging to be abused. You can’t really tit for tat with a household appliance here, these straw men aren’t of the same planet.
Then start your own company where you control the direction of the products. All these people make millions and only speak up after they are set for life.
I’m torn. On the one hand it’s nice that the rank and file take a stand against extreme overreach. On the other hand these rank and file scientists, engineers, whatever are fostering a technology which has so many at-best questionable effects on all of society.
Idealists who “genuinely”[1] want to change the world “for the better”[1] will just move on to the next Interesting Problem if it ends up making the world worse.