Actually, just like this video, his schtick was that he would take all comers to debate, and he always gathered a number of people who actually took that up and even if they knew he debated in bad faith, they saw the chance to be in the conversation and generate content supporting their contrary views by showing how much of an obtuse asshole Charlie Kirk was.
Large numbers of people went to his events to specifically disagree with him.
Of all the things one could find fault with Miller, porcelain dolls are not even on my list. A man who openly stated that he would have red states send their National Guards into uncooperative blue states without permission, and folks are talking about whether or not he has what sounds like an innocuous if not unusual hobby.