How can that be "the" issue? That's fundamentally how business equity -- the entire stock market -- works. Certain decisions are put up to a vote of shareholders, one-share-one-vote, and the result binds all shareholders.

It's no more unusual than "forcing" naysayer shareholders to accept the dilution that comes with e.g. a secondary offering.

(Certainly, there are reasons to dispute the prudence of the decision, but that would be orthogonal to your argument, which seems to be about the mere fact of overruling minority dissenters.)