You are exposing the same data, the matter is to who. So if you consider more dangerous some random relay operators or a big tech that match and share your data with other big techs, building a very detailed profile.

Hownever I understand your concerns, in fact probably you will soon find a big tech within this random operators.

Some clients are already working on this front, for example Gossip and Coracle permit to selectively block the connections to "external" relays.