I'm of the opinion that that's probably not true. I'm guessing that you just don't watch or give much thought to shows with characters you don't buy. For example, I can't imagine that you (or anyone else) ever saw an episode of Homeboys in Outer Space and actually bought the characters (or anything else about the show).
And that was the case with me. I just stopped watching Voyager. Again, it wasn't until years later, in 2019, that I actually watched through the Voyager series.
I watched through it specifically because Seven of Nine turned up on the advertisements for the ST: Picard series and I wanted to familiarize myself with the character. I, at first, watched the series premier and then skipped to the last episode of season three and watched seasons four through seven from there. After I did that, I went back and watched the whole series from season one onward. I was able to do that because the later seasons with Seven sold me on the series in a way that the earlier seasons never did.
I watched ST: Picard all the way to the episode where Seven of Nine finally shows up and never watched another episode. My loss of interest in the series followed a similar (though not identical) trajectory as watching Voyager the first time. In this case, though, it wasn't so much a matter of rejecting the character(s) for not being 'real' so much as rejecting the entire series for not being Star Trek.
The series right from the start was breaking away from the long established ST formula and any time the production does something like that, it arouses a certain suspicion in the audience that the production might not know what they are doing. Seven finally makes her appearance in the series and it's not the same character that we are familiar with. It's a completely different character that we don't know anything about but just so happens to be played by the same actress. And so, like 'Threshold', the episode confirms our suspicions that the production doesn't know what they are doing.
Off on a tangent, my brother and I both consider ST: Nemesis to be among the best of the ST movies but the movie is counted among the worst by the larger ST fan base. My brother's theory is that the reason is that Nemesis (much like Picard) doesn't actually follow any of the standard ST formula for movies in the way that it was directed and that it would have faired much better if it had been a stand alone movie or part of a different franchise.
