Sorry, I don’t follow. Which Catholics, and wrong about what? Also, I have a question. When did someone decree that priests must be celibate? Wasn’t it only a couple centuries ago?
The standpoint of the Roman Church was different. Thus Pope Siricius declared in 385 that priestly marriage had been allowed in the Old Testament because the priests could only be taken from the tribe of Levi; but that with the abandonment of that limitation this permission had lost its force, and that “obscoen cupiditates” (i.e., marriage) hindered the proper performance of spiritual functions. Succeeding popes adhered to this view (cf. decretals of Innocent I., 404, 405, and Leo I., 456, 458), and the rest of the Western Church came to it (Synods of Carthage, 390, 401). Candidates for the higher orders were accordingly required to take a vow of celibacy, and from the fifth century those for the subdiaconate also.
The Church had varying opines until the Council of Trent in 1548 and at that time celibacy became the rule.