If I interpret your statement correctly, you're basically asking, in a summarized form, this: Is it right for Google, by changing their (non-public) algos,

If I interpret your statement correctly, you're basically asking, in a summarized form, this: Is it right for Google, by changing their (non-public) algos, to de-rank to lower levels your website? ? (therefore multiple themes like a potential conflict involving their public_vs_private services, impact of changes on the global users, can search algos be non-public, lack of alternatives, etc...)