Clinging to something and having your career ended by it are two different things. As they say, theories don’t die until the people advocating them do.
I don’t know what to tell ya, Varda. The concept that alternative theories to Clovis first were pushed in academia or those who did were accepted by the establishment has been gone for “many decades” just isn’t reflected by reality. This is well known. I was a student in the space and worked on multiple Clovis sites as part of my major towards the end of this period. I don’t have much else to say about it