Haven't been, so can't really answer. But in my opinion, I wouldn't go to Alaska just for Alaska. Instead, it would be the entire trip and everything along the way. That is why I'm saving the trip until I retire and can take at least 3 months to make the trip.
Since I usually travel back roads, preferring gravel/dirt, I don't think the roads in Alaska would shake my rig any worse. I'm never in a hurry, so always slow down to conditions. Again, the reason I need at least 3 months to make the trip.
I do love Yellowstone and Utah, so I've got years to explore those.
So is it worth it, depends on the individual. And I have no problems with your opinion, sounds reasonable from your perspective. In my opinion, I don't think Yosimite is worth a visit and almost wish I hadn't visited the first time.