well, no... devs themselves said its supposed to be alternative to raiding, so you are factualy wrong
as it is, its fine, i dont think the ONE mythic raid item that you can get per week is such an issue... especialy since if you ignore M+ you still can get gear from vault...
and sure, m+ is easier than raiding (well, mythic raiding, anything below is pretty easy itself), which is why currently mythic raid rewards BETTER gear... you can run M+30 and you still wont get as good reward as people clearing myhtic raid...