You do and I’m still not sure why.
There aren’t really that many chances per round to trigger an uncanny dodge.
How many times do you expect your rogue (out of the whole party) to be the target of enemy attacks?
I would agree. From my experience in Solasta, the most outrageus examples were Smite and Metamagic - none of which are reactions, and could and should be implemented differently.
Another thing, that I don't think people who didn't play Solasta keep in mind, is that you get one reaction per round. If you are surrounded by bunch of samey units, then you will likely just fire something like uncanny dodge on the first opportunity because: a) it doesn't really matter if you dodge this goblin or another b) you don't know if you will be attacked again. Once used up, no more popups for you for that character this turn.
