It's even the best choice for de-googled users, since it has regular source drops for security updates and ability to upload custom signing keys for bootloader lock.
No, "99% of Android users" don't live in Google land for "everything". I am not talking about degoogled users here. But a vast majority of android users use very few google apps(apps like maps, youtube and iOS) which would be used on iOS as well) and many don't even use google photos.
100% of which have Gmail accounts... which is required for Play Store access and payments. A significant portion are going to have Google One (for cloud backups, including photos...).
What are you talking about then? Pixel is a high-end android device, even if you try not to use google services.