haha how can this even be an issiue?
Mythic+ keeps my main intressting now since I dont raid and frankly even thou I cant put in the same amount of time as others I still love doing them.
Why would "Someone else has better gear then me cause they can play more" be an argument to block them from doing content?
Put it like this. Having ALL that time to play might put them about 10-15 ilvls higher then you, thats it. Sure they might get accepted into higher Mythic+ groups for it but common... if you soo wanna play high-end mythic+ get a static group that you can play with instead.
And if ur not a hardcore player anylonger how can even ilvl be that important for you?
Do what you find fun ingame and stop comparing your character to someone who is clearly a hardcore player with tonnes of time on their hands (and whom would have even higher ilvl then you if there were no mythic+ cause they raid mythic raids while you would be stuck with low-ilvl gear from normal mythic dungeons).