Im not sure it is an all or nothing.
I would perfer to share my queries with one 'client proxy' with a good reputation than lots of unknown  relays.
It could be a point of centralisation that can be the target of censorship requests.
So long as its not used relied on for general queries but to find specific events / nip05 validation and clients fall back to using querying the relays, I think it is a great trade-off.