Most of the time this doesn't hurt anyone, but let's say for the sake of argument that one of these influencers isn't a mildly attractive middle-class teenage girl with thoughts that don't extend beyond family friendly fun and self-enrichment.
Let's say instead you have a 25 year old man who started out with inspirational instagram posts have slowly started to cross the line into far-right slogans and maga hats. Now you don't just have some randomer endorsing your product, suddenly your family friendly business is being accused of been forking money over to neo-nazis.