I don't know why, with the information we have, anybody here would be "Donic or Bust" or even "top 2 pick or bust" about this.
Why is it not sensible to do the workouts, interviews, and conclude "we really kinda want the better of Porter/Bagley, and wouldn't be heartbroken with Doncic or Ayton, so lets swap down to 4 and get something nice along with Porter/Bagley"
This line of thinking is pursued all the time in drafts - the 49ers did it recently. If you can get your favorite player on the board (in the hypothetical it is is Porter or Bagley) and a 2019 first rounder or some other nice piece... Why stand on some kind of principle and refuse to do it?
How do you all know Doncic is so great? He's had a hype machine working overtime but if he's Manu Ginobli, and Bagley/Porter are Kevin Garnett then you really failed by making a brain dead hype train momentum pick at #2 instead of doing your proper homework and being creative.
I can't wait to see how it plays out - but one thing it is not... it is not a no-brainer.
I'm not sold on Doncic. I love the kid but I'm not sure I see a star in the making. At the very best I think he could be a bigger but slower and less athletic James Harden. I think it's more likely that he's a high level role player/good starting quality wing. If he isn't the primary ballhandler at least a good chunk of the time I'm not sure he reaches that level.
Also, to the idea that you don't consider trading the #2 pick, here are the guys drafted in that slot since 2000:
2017 Lonzo Ball, UCLA – Los Angeles Lakers
2016 Brandon Ingram, Duke – Los Angeles Lakers
2015 D’Angelo Russell, Ohio State – Los Angeles Lakers
2014 Jabari Parker, Duke – Milwaukee Bucks
2013 Victor Oladipo, Indiana – Orlando Magic
2012 Michael Kidd-Gilchrist, Kentucky – Charlotte Bobcats
2011 Derrick Williams, Arizona – Minnesota Timberwolves
2010 Evan Turner, Ohio State – Philadelphia 76ers
2009 Hasheem Thabeet, Connecticut – Memphis Grizzlies
2008 Michael Beasley, Kansas State – Miami HEAT
2007 Kevin Durant, Texas – Seattle Supersonics
2006 LaMarcus Aldridge, Texas – Chicago Bulls (Draft rights traded to Portland Trail Blazers)
2005 Marvin Williams, North Carolina – Atlanta Hawks
2004 Emeka Okafor, Connecticut – Charlotte Bobcats
2003 Darko Milicic, Serbia & Montenegro – Detroit Pistons
2002 Jay Williams, Duke – Chicago Bulls
2001 Tyson Chandler, Dominguez HS (Calif.) – L.A. Clippers (Draft rights traded to Chicago Bulls)
2000 Stromile Swift, LSU – Vancouver Grizzlies
Only THREE of those players have ever made an all-NBA team. Durant obviously has made one nearly every year, LaMarcus Aldridge has made a few and Tyson Chandler once made the third team.
A lot of role players, some very noticeable busts, one all-star and one definite Hall-of-Famer. Not a sure thing by any stretch. If you could move down a couple slots and get extra pieces or picks while still getting a prospect you like a lot, or potentially trade it for a proven star, you absolutely have to consider it.