Actually, I find that some debators on both sides (anti and pro Catholic) can be excellent debators. And then, on both sides they can be boring.
I found the responses all interesting and noteworthy. Btw, I guess you realise I am new on this thread - hello to all!
Debating is a skill. However, it is not just a skill, though. No matter what is debated, it must be done through the grace of God because everything, even debating whether Star Trek or Babylon Five is the better show (which I know sounds ludicrous) is a spiritual matter because we are a spiritual people. Nothing is truly secular, all things are under the authority of God. Therefore, it is a skill which must be developed but also is a gift from God. Not everyone has this gift. I can do it, but I cannot stand the fact that debates usually descend into arguments in which no one is learning anything or really sharing anything and the grace of God is not being used.
Debating also requires knowledge and reseach. Many protestants, and I know because I have been there, do not research the Church from both sides of the coin, the anti and pro. Therefore they do not know the arguments and beliefs of the Catholic side. They just quote, as one person put it, from websites. I once debated with a Mormon friend - it stayed a friendly debate, btw and hope that she went away with something that changed her mind. I’ll have no way of knowing until the final coming. I did come away with something. Actually, I had done my research from both sides, but mainly from the anti side. She asked me, when we finished talking, to look at more Mormon sources next time. Although I actually had, I realised that there was still more research to be done before I debated again. Some people are against this - will not read the Book of Mormon or Koran or whatever because they are not inspired by God and might have a negative effect on the well-meaning researcher. I understand this attitude. And one must be very, very careful when doing so - The Book of Mormon never turned me, but I found it very, very appealing. So doing it with the grace of God and by His permission is the only way to do it. He might not want someone doing that kind of research and in my opinion, that means not debating.
There is a very seemingly subjective reason as well, although because the Catholic Church is the complete Church I see it as objective. We have the full truth. The Protestants are Christians, but they are lacking in the full truth. One only has to see how many denominations there are and why they split - not just over issues such as antibaptism, predestination, the Real Presence, whether to be welcoming to all (the American Methodist Episcopal Church was formed because the white Methodist, a coupld of hundred years ago, did not want blacks in their congregations. Happily the Methodist Church is no longer that way). Sometimes churches split over even non-doctrinal issues. So that says a lot. When people do not have the full truth, EVEN when they have done all the research, they are going to be lacking as debators and sometimes, as one person put it, “boring”. That’s my take on things.