The one wrinkle that may make the spurs take a guy like Matas if they believe in him is that the spurs have shown a desire to have multiple ball handlers who can all shoot, pass, and drive. This theoretically works well in a playoff setting where guys can get schemed. If the spurs take Topic, they are committing to a specific style of play with him as a semi-heliocentric ball handler creating for others. Topic is not someone who I would try and play off-ball, much like a guy like Jeremy Lin. If you compare at Lin's efficiency when he was the primary creator with the knicks vs with the rockets the next year when he was forced into an off-ball role next to Harden, there's a huge difference.
If the spurs are committed to having multiple ball handlers who can all attack, they are probably drafting a guy like Matas with their first pick and then will go hard after a guy like Reed Sheppard with their second pick as a guy who can hold his own defensively, shoot lights out, and function as a passable creator. A lineup of Sheppard-Vassell-Matas-Sochan-Wemby in theory provides you with multiple guys who can create or shoot, especially with Sochan's developing shot. This is an interesting stylistic change compared to a theoretical lineup of Topic-Vassell-Risacher-Sochan-Wemby and I'd be curious regarding others' thoughts on the differences between these two lineups.