Uhhhh no... that is how you make the biggest draft mistakes ever (Chris Paul comes immediately to mind). If guys are in a similar talent tier you can put a premium on position or "need". In general you don't draft for current need as a "contender" because rookies won't play.
The only caveat I would add is that for a center who can't shoot or handle the ball they need to be so supremely talented to be in a tier with good wing prospects. Especially if you have a guy in place. Udoka was a terrible pick (Tony Bradley too) because the upside is so minimal. If they can protect the rim and shoot... or if they are like DeAndre Ayton and project to be good at many things and are physical/athletic freaks... then go for it.
JB was a tough fit for us this year but could have filled the Forrest role (10 minutes a night) and been just fine. Then the following year you can move on from JC or Conley and expand the role a bit. It was a great gamble and if he had been picked by a rebuilding team he'd likely have a role and put up solid numbers. He's going to be good. It was a well reasoned pick imo... but we should have taken him at #30 to give him a 4 year deal and extend the runway.
Drafting Herb with the idea that he was going to be the backup combo forward in Rudy Gay's role would have been a pretty wild assumption on draft night or the pre-season and everyone is thumping their chest like they are geniuses when really only one poster was on the Herb Jones bandwagon. There are guys like Herb that don't work every year... guys that tick the boxes. Bey, Woodard, Okpala, Keita Bates Diop, Okogie... like there are a lot of athletic guys with measurements that end up being so bad at shooting or just not good enough in other areas so they fail. Herb wasn't a can't miss type... JB was regarded as a lotto talent but had some medical issues that kept his stock down. It was a solid pick.
It's easy for you to say these things now after the fact but like i said, hindsight is 50/50 and judging a player's talent level during a nba draft is completely subjective. How do you define a player being the most talented and the best available?
Some would say the player who was the most nba ready(Jahlil Okafor, Derrick Williams, Jabari Parker, Trey Burke, etc) and some would say the player who has the best measurement and raw athleticism(Frank Ntilikina, DedEx, MKG, Thon Maker, etc).
See? you can find busts in both of these categories. Some would still argue that we really should've drafted Giannis in 2013 but the reality is that none of us has a time machine to know that what we were looking at was the future MVP of this league.
But what we really don't need a time machine for is the basic needs of this team. i mean it doesn't take rocket science to know that this Jazz team needs some size, athleticism and defense across 1-4, which makes Herb Jones the most fitting candidate.
Had we selected Herb Jones, at least we would've gotten a chance to see what we truly have because he would've gotten ample opportunities to play. We don't know what we have with Butler. And unless we go into a full teardown next season, Butler may be gone before we could ever find out