A Hypothetical example of the current situation:

Let's say in Patch 1.21, Doh/L get a quest at r25 that grants them a "Return Ring". It is only available to DoH/L that have pledged allegiance to a Crafting Guild, ranked up beyond Recruit and costs 3000 Guild Points.

I would not cry foul, unfair, discrimination. I would rank at least 1 craft to 25 (22 is highest now) so that I can get the "Return Ring" since any class can use it.

Do not be surprised to see much more "content" like this in the future. There will be perks for every class that will make you jealous and want to level that class to get it, whether it be an item or Class Ability.

Also, don't forget that DoW/M already have to level multiple Classes (that perhaps they hate) just to get the desired Cross-Class Abilities. It is the way the whole Armoury System was set up in the first place.