TBF, it's a race where it might as well have been the WT team racing - like IPT.
If they'd had him ride some random cat.2 race, then it would be a problem. However, I don't think that's allowed, just like devo-team riders aren't allowed to ride for the WT team for WT races.
This is a random cat. 2 race. But seing as IPT has brought only one WT rider, it's of course true that QS could have done exactly the same.
Of course they don't care about UCI points BUT it shows another flaw in the points system - The more important issue is that a WT rider should not be able to drop to down to the Development system for racing.
I think the rules are in place to make it possible for devo riders to have opportunites to learn from more experienced teammates while also giving some of the less exsposed WT riders chances to score results. Can this system be exploited? Sure. Have teams successfully done that yet? No. IPT tried last year, but didn't get that many points out of it.
If it becomes an issue in the future, I don't think the UCI would be against tweaking the rules.