That was my point. There was another factor involved. In that case, it was a mishandled license.The new 4e licence - I can't remember it's name but it was more restrictive than the OGL - put many publishers off producing for 4e. The brand had power but the licence killed interest. PF2 doesn't have that excuse.
PF2 doesn’t have to have the same other factor, but there will be another factor if the premise (that support is lacking) is true. It’s just not any of the posited factors thus far, as none of those have been shown to be barriers in prior situations.