Very, very bad and consumer-hostile sentiment that is inconsistent both with good ethics and with the way that the regulatory system works currently.
Regulations on goods sold exist for a purpose - to allow the user to generally buy things while having some guarantees about their lifetime/security/safety/consistency with marketing/etc.
"If you don't like it, don't buy it" implies that companies should be able to sell goods made with toxic substances, not honor their warranties, lie on their marketing, and steal and sell your personal medical information. This is bad.
If I buy a product, I expect to be able to do whatever I want with it, and to not have arbitrary limitations on how I use that product that exist purely for the sake of making the seller more rich, and this is consistent with the way that consumer protection regulations work in general.
> Uniformity and convention over configuration and customization is why people feel why iOS is more stable and secure than the Android ecosystem as a whole.
False. The vast majority of people have no opinions of whether Android or iOS is more secure. Slightly more, but very few, of them have any opinions on their relative stability, and you can attribute exactly all of that instability to a mix between (1) manufacturers making terrible drivers and support packages for their hardware and (2) Google being generally bad at designing software. It has nothing to do with "uniformity" or "convention over configuration" at all.