Besides doctrinal issues, IF Rome formally disfellowshipped those who manifestly are heretical, or immoral, then that could help you to have a case for Rome, but there is little of that, as having lost its unlawful temporal power, it seeks to play both sides, allowing most any manner of Catholic to be called such, as we saw in Teddy K. For her the real message is, as long as you die in the arms of Rome then she will get into Heaven.
The ecumenical movement did achive elimination alot of propaganda and half truths being proliferated within the christian landscape. Unfortunatly, amongst those who have a fundamentalist bent this wasnt necessarily the case. The same tired, old worn out, but false arguments keep being wheeled out against the Catholic Church and its understanding of the Bible. Sure there is room for disagreement, but the things I am talking about and which you espouse have been clearly rejected by theologians of the more dominant Christian hierarchies(Certainly not impressive to you). but to list:
Priestly Celibacy being against the Bible -False
Call no man Father ~ cant call a priest Father ~ False
Jesus had brothers and sisters through Mary ~ False
I wish I could name other off the top of my head, but there are many in this category. To be fair I can sympathize with you on purgatory because of the restriced way(Sola Scriptura) you have of thinking on these matters. You reject matters that are historical and are part of the deposit of teachings of the apostles. Modernism,Liberalism rejects or disputes the era of old as untrustworthy and to be discarded. But so many other issues that you stress are coming from an old and incorrect playbook...a playbook that is in a major way corrupted with half-truths and uncorrected lies.
As to address our original issue, this link says it all
and addresses each of your argument and more:
http://www.catholic.com/library/Celibacy_and_the_Priesthood.asp
Further, this is my favorite beginners Catholic website.
Try dispelling alot of this. http://home.inreach.com/bstanley/
I used to be Protestant but studying Church History led me to an inevitable conclusion of accepting the Catholic Churches claims as being true.There are two sides to every coin, and two sides in each argument. Listen to what the Catholic church says about each of these things not what you church(sites that espouse your viewpoint) says the Catholic Churchs stance is.