Rest assured that any party that locks out MCH, though we are yet to see the extent of dps checks for this tier (hoping P8S doesn't repeat itself with the state of job balance being the culprit there as well, more-so than a tougher dps check), are probably clueless on why MCH is bad and how BRD/DNC become statistically better than it. That being the fact that 7 jobs playing into buffs who all scale with potency buffs, gear, stats etc. will always outclass a neglected selfish dps like MCH that only has its own contribution to rely on, which is typically not worth bringing in any competent group if you're going for extra damage. Competent is the key word here however, as MCH is of course the better choice as player skill worsens. Unfortunately though, some denizens of PF either think they're a god gamer, are clueless about why rDPS metrics are the way they are, or both. An eternal struggle. Big coloured bar better than smaller coloured bar, apparently.

That said though, this has been a problem on and off since the start of Endwalker, so it's sadly to be expected. The only way to get through to SE by now is to entirely stop playing the job so it'll hopefully set alarms off and they'll realise that maybe people don't want to feel like a second-rate citizen in FFXIV anymore after years of putting up with it.

You do you.