At least with the way Lemmy is designed it doesn't seem like even the main devs can have much of an impact.
They even write themselves that if they made changes to the Lemmy codebase that some instance admins didn't like, then those admins can decide not to upgrade their instance. The code is also open sourced so anyone with some tech know-how can fork the codebase and remove whatever they don't like.
At least with the way Lemmy is designed it doesn't seem like even the main devs can have much of an impact.
They even write themselves that if they made changes to the Lemmy codebase that some instance admins didn't like, then those admins can decide not to upgrade their instance. The code is also open sourced so anyone with some tech know-how can fork the codebase and remove whatever they don't like.