While I agree this is inconvenient, this sounds like something on Wikipedia to address.
I think it’s going to be a losing battle to try to not only make everyone everywhere aware of the problem, let alone convince them to put in the (admittedly minimal) effort every time to deal with it.
It does for me. On mobile if Wikipedia notices you are using a mobile browser, it automatically redirects you to the m. URL.
While I agree this is inconvenient, this sounds like something on Wikipedia to address.
I think it’s going to be a losing battle to try to not only make everyone everywhere aware of the problem, let alone convince them to put in the (admittedly minimal) effort every time to deal with it.