Play Integrity's highest level of attestation features requires devices to be running a security update which is within a sliding window of 1 year.
LOTS of Android devices have not released a security update in many many years. This forces users to unnecessarily upgrade to higher end OEMs.
Google is effectively pushing out Xiaomi, Huawei, and many others that offer excellent budget options. Google is not just offering you the comfort of not having to fill out CAPTCHAs on your phone, most importantly they are playing monopoly.
I never had to wait on Dell to type apt update and apt upgrade.
You've never had to wait for Dell to type apt update and apt upgrade, but MacOS users have to wait for Apple to update their computer.
The OEM phones are cheap because the manufacturer sells them at a loss, recouping money by locking them down and pre-installing certain software.
The alternative is that Google is properly regulated, or cheap smartphones phones don't exist.