Seeing as no-one's answering the question in terms of privacy (although I agree with their sentiment)

Trust. You have to trust that they will respect your privacy. They actually talk a good game, are probably superior in privacy to the average android (but not GrapheneOS or Linux) in so much as they fend off other entities trying to hoover your data, mostly so they have exclusive access (at least to metadata, actual data may currently even be secure but that can change and possession is nine tenths and all that). At the end of the day, they're a greedy mega-corporation and cannot be trusted if they need to keep that line going up this quarter. I much prefer transparent systems that keep me in control and possession of my data.

I like their hardware, excellent build quality (shame about long term support and e-waste though). Will probably pick up a cheap M1 Air once Asahi linux stabilises.