Name me one other job that can solo VD avatar, merit in 10 mins due to being one of the best cleavers in the game, self haste cap as DD so needs two less trusts to function well, and out survive all but dedicated tanks while doing top end DPS. It has everything to do with the tools and how strong they are, people that know the game very well are changing to BLU because they realize it is stronger and makes the game easier for them, people follow their lead because they see the results of that. It isn't bandwagoned because of hollow arguments like you are making, and it isn't requested to constantly be nerfed by tons of people because of that either. It is bandwagoning and called for a nerf because it has too much power in one place. Have a magic spell load out for cleaving, have a DD set and be very survivable, self spam CDC for light. This also creates problems that BLU players will not let other DD join, because they know other DD require more buffs. It is easier to just get 2 BLU to DD and then benefit from more buffs from the support that aid damage and have greater flexibility in setups. Due to their survival even on t4 reisenjima mobs you can even cut out dedicated tanks. The issue isn't that other jobs can't clear the same content, with exception to soloing VD avatars in so fast of a speed (3-4 mins isn't uncommon) it is that they can do everything easier which gets more people to play it. Personally, I'm sick of seeing BLU everywhere, this game has 22 jobs, they should be more balanced.

There are great DRK, SMN, and pretty much every other job videos out there. People don't pick BLU because of the conversation and it's not just happenstance we are having this conversation, we're having this conversation because except for BLU players who wish to deny this which for any nerf there are always deniers and almost all of them play the job being nerfed, most everyone else recognizes it is a problem. BLU can't shave 20 minutes off every set of merit bcnm fights because the player is more skilled, they do it because their AoE is ridiculous. They don't solo VD avatar because all BLU players are more skilled than people that play other jobs, they do it because their self capping haste, damage + survival stacks it far into their favor. They don't push out other DD jobs in setups because all BLU are just so much more friendly and good of players, or because of youtube videos or a lack of skilled players on other jobs, they do it because they make fights easier if they do. They don't bandwagon because of anything other than they make the game easier for you if you play BLU, it is the path of least resistance to change jobs to BLU rather than try to play 3-4 other jobs that may or may not perform at the same level as BLU in the same content. BLU is an objectively easier choice to make to play. That isn't why DRK mains that played DRK for 12 years gave up their job to play BLU or why when people are deciding what job to DD as they pick BLU or why more and more play BLU every day. It is a balance issue and a nerf is absolutely necessary to correct this.

Even before mighty guard and the new aoe spells were added, BLU was bandwagoning, now it's just worse than ever. If you play BLU you don't need haste support, a cleaving job, a defensive survivable DD, a DD that does great damage, and even in a lot of cases an enfeebler (using gravity on this month's ambuscade frog for example), because BLU does all those things at once and most of them better than alternative options. Their survivability alone breaks many fight mechanics, and they don't even pay for it with lesser damage. When BLU is in a full DD set and their normal DD spell loadout tanking ilvl 150 mobs you're going to tell me the conversation has to change... BLU has to change or the game will be 90% BLU players because as it stands it is obviously the best choice.