You'd be correct. In 2021, IMDB indicates there were 1,388 horror movies released and of that total only three of them were found footage, which equates to 0.2% of the total horror movies released that year. I don't know how many horror movies have been released over the years, but according to this list on IMDB there's a little over 500 found footage movies in existence, which is definitely less than a percent of the total horror movies that have ever been made. OP is reaching, and badly.

EDIT: I've seen some other websites that list additional found footage films not on the aforementioned list, but even assuming there were 15 total released in 2021, that would still only be about 1% of the total horror output.