The obligation is something you take upon yourself. Not everyone chooses to do that.
And just as everything can matter, nothing can matter -- in the very largest scheme of things.
And just as the inheritor of the Alox marble machine can "borrow" the tank and personnel from Jabo, and call the marbles produced Alox marbles (which I believe she has every right to do), the various investor or patron groups can rent the tank and personnel from Jabo -- and supply their own glass and chemicals -- and call their marbles whatever they wish, and do whatever they wish with them. And Jabo can say "they're not Jabo marbles," and have it be so.
I think your concern is admirable. I just prefer to accept personal responsibility for what goes into my marble collection, and believe that ultimately each collector (newbie or oldie) has to do the same. It's your taste, your money, your collection, after all.