It's not all or nothing. Depending on your threat model, Apple's services might be fine. But I guess most people don't think enough about the implications of storing many years worth of data at a US company like Apple.
Apple has actually proven itself over a long period of time on this issue. Maybe Mozilla has as well (do they encrypt telemetry logs etc for people with a Mozilla login?) but I haven't heard so much about that.
Did you really forgot about Snowden's Apple slide? Also their phones are routinely mirrored at the border. Just to support the unconstitutional government agenda of policing thoughts and speech.
