This stops working when the matters that Orban is vetoing are time-critical. Like military aid for Ukraine.
Orban is creating a situation where the EU has two bad alternatives to choose from, and he doesn’t think they’ll turn on Hungary. But they might, because at this point, most of Europe seems like they’d prefer Ukraine being in the union over Hungary. So if Orban calls the EU’s bluff, there’s a very good chance that the EU will call Orban’s bluff and kill their voting rights, with full knowledge that it would strongly push Hungary towards leaving the Union. It’s a trade off; everyone’s done the math at this point. We’ll see how it actually pans out in the coming weeks.