Yes, that's what a suggestion algorithm is.

There is no pure Platonic ideal neutral objective suggestion algorithm. Every suggestion algorithm is going to have biases based on both its training data and the goals (explicit or otherwise) of its creators.

You've gotten as far as, apparently, noticing that tweaking the algorithm after the public has seen it constitutes a choice on the part of the designers about what they do and don't want to show you. Now take the final logical step, and observe that they already made choices about what they do and don't want to show you in the initial design, before the algorithm ever went public.

If you have a problem with the former, I don't see how you can be logically consistent while not having a problem with the latter.