I think it's the opposite - without an "Algorithm" (instead just the simple algorithm of sorting posts by time) there's no natural way to find other interesting people to follow!
What Mastodon does is replace a computerized algorithm that tries to find you things you would be interested in with a "social algorithm" which is people you follow boosting posts that they like or find interesting.
It's like getting book recommendations from a friend instead of Amazon! Sharing things that we like with others is a deeply human activity, one I think is generally very positive.
Anyway, if you don't like what someone's boosting, you can prevent their boosts from showing up on your feed. Great thing about a FOSS, interoperable system is it's configurability!