It... does, though, so long as casts (or, more importantly, the mobility conflicts they'd cause) are the primary criteria. By portion of mobility conflicts, SMN belongs nearer to Physical Ranged than to RDM, let alone BLM.
SMN casts less than 13% of the time, and can bank those casts to be used away from necessary movement (creating next to zero mobility conflicts, whereas the likes of RDM have to rely on fortuitous timing, Swiftcast, or a held [temporarily wasted] Acceleration, for a sum of 2 delays available per minute without burning gauge and potentially delaying rotation away from buff sync).
Cast times and mobility conflicts cannot significantly be what separates Summoner's performance from that of Physical Ranged. So, unless the likes of Tactician, by itself, is somehow seen as worth some 3% rDPS more than all of Summoner's utility combined and Bard is simply overtuned at the moment, Summoner and RDM should be nearer to Physical Ranged.
Either specific utility, the other difference between Casters and Rangers, explains the gap --strange explanation though it would be-- or the situation is not yet correctly tuned for Physical Ranged and you should probably stop telling them that they're fine.
:: Hopefully all this is simply a matter of XIV refusing to do potency nerfs and therefore being afraid of overbuffing jobs right now, but for that same reason it also makes little sense to tellotherunderperforming jobs that they deserve to be there -- be that "per tradition" or whatever other criteria that can't be applied evenly to the currently better-performing jobs. I do think SMN should have nearly the rDPS of RDM, if only because its noticeably greater mobility hasn't amounted to all that much in most among recent raid designs and it has faintly, faintly less utility. As the likes of Dancer and especially Machinist have even less utility, though, their gap should likewise be far smaller, under similar logic.
Tl;dr: If anyone seemed at all miffed, it's only because in the same thread you asked for buffs to job A, you also kind of off-handedly told all jobs there-below that they deserve their place while ignoring what little criteria, in practice, actually sets them apart.