Well, that’s exactly it. Dual spec, imo, is game changing, and doesn’t actually solve the problem of wanting to have different specs for different content for everybody. It might solve that problem for some subsets of people playing some classes in certain ways, but…
It merely displaces the issue that there is a deterrent to respecc’ing, by way of the price being too high for many people to take advantage of it. Now, if you had a case to make for why people shouldn’t respec often or at all, then this might be a different story, but I don’t think it’s the intended design, and I don’t think the current system works as intended at all.
Dual spec merely displaces that for some people. It doesn’t prevent the need to respec for different content though.