I remember at some point in my youth, when Christmas fell on a Sunday (shortly after the Catholic Church had OKd the Saturday night mass fulfilling Sunday obligation), a relatively huge brouhaha when the bishops made a special ruling that Christmas Eve mass did NOT fulfill both the Sunday and holiday obligations. I believe their ruling was that to fulfill the obligations, you were supposed to attend two masses between noon Saturday and midnight Sunday. (I am sure it had nothing to do with making two big holiday collections.)
So they ran Saturday afternoon/evening masses at noon, 5 and 7 p.m., the big Midnight Mass wing-ding at 11 p.m., then a full slate on Sunday (7, 9, 11 a.m., 12:30 and 7 p.m.)
That was back in the days when they had all the priests they needed, they could throw all the masses they wanted. They could have 10 masses on a Sunday if they wanted to.
According to my sister who still goes to the same parish (now consolidated with another nearby parish), this year they will have the Midnight Mass (expected to be jammed beyond the rafters) and one mass, 10 a.m. on Christmas Sunday.
They don't have the priests to say any more.
It is what it is, boys. If it's so important to you to keep women and married priests out of the church and protecting the pedos at all costs, keep on keepin' on. Eventually you'll have nothing left.