To be fair though, once you undermine this clause, the rest of the comment can be applied to almost any enterprise: illegal drugs, weapons, or almost any other harmful industry.
"Bringing joy to millions" might be a bit more of a stretch for some of those.
Proponents of recreational firearms or cannabis certainly use arguments like this.
Probably more accurate as hundreds of millions.
It'd be difficult to argue that most drugs do not bring extreme joy to their users, it's just coupled with equally or even more severe lows after. If you could take heroin without getting addicted or dealing with withdrawal, why wouldn't you?
That you compare Disney and children's stories to narcotics and "harmful industry" is laughable. Sure guns/drugs etc bring joy to some people but their harmful side effects - both to society and the individual - are much much much worse and widespread compared to Disney which really has very little to no harmful side effects.