No you couldnt becouse by time you got better gear to actualy defeate them those q would not be relevant for you rewarding barely any exp and with absolote rewards. And gl.skiping them becouse thats lot of exp you will be missing later.
And you have literaly described retail. All you do is spaming same raid over and over only to increase difficulty level and do same content over and over so you can again increase difficulty. Its boring. In old game when i cleared t4 i start progressing t5. When i cleared t5 i start progressing t6. It was great adventure. This nonsense with uping difficulty levels doesnt hold any interest or desire in players to keep playing. Specialy not after clearing raid in LFR.