If you believe your talent level is higher than late 2nd round, it's common for agents to send the message to drafting teams that his client won't be be available and instead would rather go undrafted.
I think Dotson clearly falls into this case.https://www.vice.com/en/article/ezevwz/the-second-round-of-the-nba-draft-is-broken-but-not-beyond-repair
The NBA has created a situation where it is far more valuable for a player to go undrafted than to be selected in the back half of the second round, which means that the second half of the draft is now defined by negotiation and posturing from teams and representation. You can use the prominent agent's words, or your own, but most everyone agrees that the second round is a problem that needs to be fixed.
And due to the fact that it's extremely unlikely someone will become an impact player after falling past No. 50, agents and players have begun telling teams not to select them at all.
"This year, I had multiple players that said 'no' to those scenarios," the agent who explained the process above said. "Flat out. That was a conscious choice after we discussed the pros and cons. They didn't like being locked in with one team and having no chance to play in the NBA this year. They turned it down. Now, typically during the draft, a few teams will call and ask if your player will reconsider, and we said no again to those who asked."
"There were some offers, and teams called on draft night," the former Wichita State point guard Fred VanVleet said about deciding against this option while at Summer League with the Raptors. "I had a good sense before the draft of where I was going to be or what was going to happen. Pretty much, though, the second half of the draft, most of those guys are draft-and-stash guys, and they tell you, 'We're going to put you in the D-League for three to four years' or 'We're going to put you overseas.' Getting my name called was important, but it wasn't important enough for someone to own me with no chance of making the team and no chance of having options."
VanVleet, who went on to sign a deal with the Raptors with $50,000 guaranteed upfront, is right on the money. It makes sense from an opportunity standpoint to go undrafted.
This article was from 2016, before VanVleet started playing for Toronto. I don't think the writer had any idea how good the VanVleet example would turn out in 2020 for his argument.