I'll give him one right here: VerRaise makes sense on RDM because it's a mixture of White and Black Magics, one of the core aspects of it is the propensity for it to aid as well as ail. Raise is on Summoner SOLELY because it was needed to be put on arcanist and given battle-raise ability so a Scholar can go as far back as Sastasha and do everything a Conjurer could at that point. If Square can fully separate Arcanist being the basis for both Summoner and Scholar, then it's likely Summoner wouldn't have a raise anyway. Your argument of adding one to BLM for reasons of balance is innane because all fights are designed that anyone playing any job will 100% be able to clear the content, even IF some jobs have it "easier" because they have one or for other reasons. The main issue for BLM right now is simply because they're balanced (for the most part) around their ability to hunker down and drop the base while standing still; there are ways to get around their inherent lack of mobility in Aetherial Manipulation, Triplecast, and Swiftcast, however that doesn't get to the inherent reason why BLM isn't as highly valued: it's a turret job in movement content because movement content doesn't make it any easier for them. If we went back to a boss like Refurbisher, then BLM would excell because movement is at a minimum there. BLM is also balanced on their cast times being longer due to the higher the potency of their spell. This is not something either of the other two have affecting them for one reason or another. If you want Square to change something to make BLM work well in all situations, make this aspect much less prominent and I promise BLM's damage would rise far above what SMN can reach while having a raise
As for your lore rewrites, give ONE example after the 1.0 to 2.0 shift where YoshiP and Square have made a major change to the lore of any single job in the game. Not even when PLD was at its worst in 3.0 did YoshiP say "okay, we need to add a new skill to PLD, but it doesn't fit the lore so we're going to do a small rewrite right here." It's not going to happen, there have been surprise twists, but they've always been within reason due to specific details. And finally, your argument about a proc based playstyle is very reminiscent of another job in this game right now . . . oh yeah, Red Mage, the job that can put out decent numbers but has its damage limited by one or two procs and literally lives off of the back of Dualcast. Yeah, BLM has a few procs too, and they can definitely change the way the job is played, but let's point out the inherent issue here: proc rate. Without the use of Sharpcast to force a proc, Thunder3 has a proc rate of roughly 10%, and is entirely dependant on RNG to be procced in the first place. Firestarter is close to that mark, being a roughly 15% proc rate off of Fire 1, which in the normal Stormblood rotation for standard content is used maybe once every 2-3 Fire 4s. Not really the easiest thing to proc unless you're going beyond O2S into the world of Halicarnassus, who encourages a regression towards the ARR rotation due to its far shorter cast times giving more time to move.
Finally, your argument about someone being forced to play a job is for hardcore world-first minded raiders. The casual raiding community cares more that you'll be paying attention to what's going on and doing your job rather than if you have this utility, that utility, or another utility, and are probably raiding to have fun and hang out with other people while taking on content that's far less boring and mind-numbing than dungeons. You can argue that there are other games for that if you want, but I'll stand by the fact that there are more people out there that'd rather have fun while they clear than actually clear the content. There is no group in the world that would like to go clear Bahamut Prime right after they got sprayed by a skunk and then had their foot slammed in the door, or worse: after having played a match of L.o.L. with all randoms. The mood won't be good and it's going to disrupt concentration. A combat raise isn't going to suddenly get high-level raiders to care about BLM any more than they do now, and low level raiders don't care, so in the end, your point about why they do need it is moot on all counts. Good DAY sir/madam.