Then don't deny acting dismissive and be real about it, I prefer someone to be straight up "I don't like your opinion its stupid" instead of saying "I don't like your opinion its stupid woah hey no offence though", its dumb.
Personally I don't care if someone comes along who has 2 hours on PCT, SCH or whatever Job im maining at the moment because I view anyone who has an honest opinion on something to have the right to say it, jobs can become peoples mains if they change to a way they like which is fine, elitism over maining a job in XIV is stupid anyway, this isn't WoW or GW2 you can switch jobs at anytime if you were locked to MCH since the start then yeah I'd think being dismissive about that is fine, but imo it doesn't matter if someone mains a job or not. I have had my favourite jobs completely changed over and over again so I don't paticularly have the same attachment to what I play as you do anymore, if you want to fight against all changes to Phys Range, sure its your life I just don't care and you'll never make me care, I am far past that now.
For SMN its not really a caster at all, for RDM its a hybrid, if it had longer casts then yeah I would agree it is a caster but really if you learn slide casting you only really stay still for at most a second every 4 seconds as opposed to PCT and BLM where if you're casting you're liking not moving around often and when you do move you have abilities designed for moving, Holy in white/Hammer for PCT and BLM many instant cast abilities. So yeah I don't consider RDM a caster fully considering its melee combo is filled with instant cast Acceleration gives you two instant casts now and swift cast has a shorter CD and this is what I would have as the ideal movement Magical Ranged and I think SMN goes too far in its movement. This is of course a subjective opinion, the same way you consider Phys range having no instant casts being core to its role while I see it as a support dps, though this is mostly because the job guide website describes it as "Physical ranged DPS attack foes from a distance. They excel at inflicting sustained damage, and also provide support for companions." If it ever said something about it having only instant casts then yeah I'll change my opinion and say its core to phys range.