There are tons of Navalny non-supporters who are latently opposed. Personally I'd say that they are actually more dangerous to the regime due to the stratum they represent. You just don't hear it on the internet because they are older and have shit to lose. Alexey was a youth's idol, not adults'. Many people never considered him a good politician, if mediocre. Maybe that other person wasn't "invented", but they definitely could use him as a trap. There's no way anything could change here through "elections".