To spell it out for you. LFR came out after CATA had already lost subs. From wraths all time high to cata losing subs LFR was not involved. Only when DS came out and LFR with it did the bleed slow/stop. Its difficult to say the game is more popular with out LFR as we have no realistic idea on how it would have impacted the game back say in TBC etc.
You have not disproven anything (If you have let me know where its posted and I can go look). LFR has allowed _MORE_ people to see raiding content then ever before. How this positively or negatively impacts normal/heroic raiding and sub loss is a subjective matter and an issue I think needs a good look at.
Yeh its ok to Disagree here i've said it before a fair few times. Some will hate LFR others will love it. For me I quite enjoy it but do want a bit more of a challenge and hopefully flex will give me that but still allow me to play with my friends, these friends were the guys I originally joined up with in Vanilla who were casual back in the day. My brother being among them and honestly most are ok but they are certainly not that brilliant when it comes to raiding. The guys I raided with in Vanilla/TBC/Wrath and cata were a different bunch who I met in game but sadly they no longer play.
As for the last part there are plenty of people on this forum I have seen whos attitude is among those. Yours is border line to be honest as you want the TBC progression model back and after doing that hardcore back in the day I would dread having to do that again. But that's not that much of an issue as much as I loathed attunements from a raid leader perspective I did enjoy doing them on my characters. It is one thing I hope they bring back (as optional and gives you some sort of cool reward for doing the Attunement chain).
The Wrath model of raiding was probably among the best if you look at ulduar. Having 10 n/h being easier than 25 n/h was great and I really enjoyed that I could do the much harder content in our guild 25man group and the 10man mode we did with guild groups but it was way more casual and a lot of fun still. That said I enjoyed raiding in Vanilla but I would not go back to that as times change.