If you're worried that nonmonetary use of block space will compromise the integrity of Bitcoin as money, then you're worried that financial sovereignty may not be the most valuable use case for the system and you're worried it can't compete for scarce block space.
Maybe you should be.
As I see it, the way things are going, the biggest threat to Bitcoin as money doesn't come from "spammers." Rather, it comes from the Number Go Up narrative pushers who tell folks that ETFs and trusted third parties are fine to use because you'll get rich regardless.
That line of thinking is what causes demand for block space to drop, thus making it so cheap that people can afford to play stupid games with the available block space.