But your argument isn't really meaningful to majority of phone users -- they are not sophisticated enough to do side loadings or installing custom ROMs or using

But your argument isn't really meaningful to majority of phone users -- they are not sophisticated enough to do side loadings or installing custom ROMs or using poorly supported stacks. What they do need is reliable phone that does things that they need them to do, and there is no real alternative for this case. It's why Linux desktop is still not a real alternative to Windows desktop (and I say this as someone who runs linux at home and professionally writes code that runs on linux servers).