One thing to bear in mind with drafting Stauskas is that we didn't have a ton of options to go with at that point. The best players to go after him were Payton (PG, Magic), Saric (PF, 76ers), LaVine (PG/SG, T-Wolves), Warren (SF, Suns), Harris (SG, Nuggets), Hood (SG, Jazz) and Jokic (C, Nuggets).
How many of them were talked about with our pick? I think we debated Payton on these boards, perhaps Saric as well, and LaVine. Though I can remember there being support for the Stauska pick in adding more firepower to the team, someone to push Ben, and possible sixth man duty. I'd tend to agree it was a bad pick, but I think he had been mocked to us and our alternatives were not amazing at the time - though admittedly those alternatives turned out pretty good but that's with the benefit of hindsight.
With that said, we do need to believe in our young players and invest in their development. However, we must not be frightened either if the opportunity to draft a potential upgrade presents itself even if we have an existing young player or two at that position. After all, we can always package any existing talent up for picks or other young talent.