> It's like saying I bought a petrol car but I should have a legal right to fill it up with Diesel or make it work with electricity.

It's not, no. It's like buying a petrol car and being limited to using BP to fill it up, and not being able to use Q8, or Shell, or whatever.

No one buys Apple/iOS and expects it to run Windows (although arguably you can, and you should be able to, if you weren't locked-in)