The reasons are very not obvious to me. Could you elaborate?

People who understand cybersecurity who are not operating within a US-allied country use ... I don't know what to be honest. What to do in such a situation, where Apple is a US-based company obligated by law to comply with requests from three letter agencies and Android is a buggy mess which probably is backdoored by every major power?

Those cybersecurity experts are using GrapheneOS and certainly not an iPhone where they can't even check if all is going well...

It would seem that integrating a backdoor funnel to OpenAI is a bit of a security issue to those who care about such things.

Yay, we can all train corporate models for free involuntarily.

I guess it's time to check out Lineage OS and Postmarket OS. It was always a matter of time.

Yea, same.

I have literally no desire to hack and fuck around with my personal cell phone, doing so would take away time from the hacking I actually want to do.