It also happens in statics, I have been at the receiving end of it for various mechanics, notably EE2 in M4S when I'm long debuff and miss a heal (and that's why all those geniuses that tell you that rphys has FULL mobility are full of s*** when it has the lowest speed across the board except for DNC). I've even had crazier similar situations in other mechanics due to fairy's smaller range. I still do believe it's not on the job but on the healers and the party and that's a positioning, healing and coordination skill issue. They even buffed mitigation and healing ranges like crazy in Anabaseios and half the things now reach for 50 yalms (which was a terrible choice for skill expression btw)... I really do like that all those constraints and differences used to bring specific skills as a player to have, notably be sure to be positioned properly to be healed (less of a thing now with the crazy ranges for most heals and mits), having sometimes healers to actually use their single target heals as well to help the weakest members and adjust for discrepancies in health and do their actual job (forgive me but glare mages I swear...), and just the party actually talking to each other. I do not like where the battle content has been going over time and I do feel that making everything a non problem anymore is literally removing what I liked about it.
However on top of Maiming jobs having even higher physical defense than the rest, melee DPS have crazy self sustain tools that they do not need more than the rest of the DPS roster, and it's ironic in a way because in pvp it's actually warranted... But for pve melees, they do not take more damage on the frontlines at melee range than ranged players do. It's a bit sad that this specificity of them isn't actually put more to contribution by all the battle content.
Which actually makes me think, perhaps that's a start of a solution to design the differences between ranged and melees while giving them an identical/more balanced damage output in the process. Perhaps ranged jobs shouldn't be able to survive well at close range. Or perhaps that's a shit idea idk.