Dennis Lindsey's first year he didn't want to come in and change everything that the Jazz were doing. He was appointed the GM just a few months before if I recall. He wanted input from everyone in the process and not to come in and tell everyone how things were going to happen. Corbin needed a point guard and felt like not having one would be setting him up to fail.
Otherwise, DL wanted LENGTH, YOUTH, and INTL talent. There were two players that fit that bill in the draft more than any other player. Gobert and the Greek Freak. I think that the Jazz liked Olynyk, but I also feel like Antetokounmpo had to be on a very short list for Dennis because he checked off so many of his boxes.
Trey Burke was drafted for Corbin to be allowed to succeed not by the puppet master himself.