I'd chalk it up more to a shortage of healers and making a last resort more tolerable with it, but the overall lack of interest in people playing support roles isn't a unique thing to FFXI. It is, nonetheless, a route people can come to socially exploit if they find the right suckers, as RDMs didn't really endgame for RDM gear. There was far too little of that to be had from Kings, Sky, or Sea and the continued trend of slow or stagnant growth with the cap increases are a big part of our issue. Regardless, melee and support aren't mutually exclusive terms.
But as I said before on the RDM board, if you're more keen on mage updates, make a thread devoted to that instead of pissing in the cheerios of the melee camp and trying to banish us off into solo land or some niche scenario where you expect melee RDMs, that you frown upon, will magically have an Almace whose sole purpose is for stronger melee. Then again, they'd have be giving up MM/Beyond/Ultimate if you want them being anything of a decent nuker alongside the melee. Being super all at once, which seems to be this nagging fear people have, isn't possible with MP constraints. And if you weren't running out of MP curing and nuking often without MM on, I'll just say you weren't being aggressive enough. It's not hard to run out just spamming Blizzard III and IV when timers are up, as was what I pretty much did when working on my Ice staff in the various Abyssea zones with 16/tic over your 7. Sure, meds can prolong things a bit, but they're never a guarantee. And again, all of this goes out the window once we exit Abyssea.