On the contrary, the argument that "someone will do it anyway, so you should just let it happen and take no moral responsibility because I WANT MY SHINY TOY" is

On the contrary, the argument that "someone will do it anyway, so you should just let it happen and take no moral responsibility because I WANT MY SHINY TOY" is… not merely silly, but incredibly absurd, selfish, entitled, and amoral. One could argue that if $BIGCORP doesn't want their thing to be used by bad actors, they should just refrain from developing the technology at all, and while it's a somewhat defensible position, that would also result in techbros not getting their toy, so it doesn't really apply here.