You can't walk into somebody's office and say look at me! I shot 47% in 11min a night! Best that might convince somebody to do is to take a shot at you as a bench shooter. Nobody is goin to sign you as a starter, nobody is going to sign you as their sixth man. The real crux of the issue is if you can convince anybody you are a backup PG, and on that front your shooting % isn't the issue. You're even more unlikely to convince them you are a 6'2" SG with defensive questions. Which leaves you going for 5th guard slots, and hoping for a 4th guard slot.
If I was Jimmer I would be looking to sign next to LeBron if they'd have me. Go someplace guaranteed to win alongside somebody who handles the ball most of the time and kicks it to me for wide open threes. That was the original idea with Reke/Jimmer. Get that winning cache attached to my name without pressure to create much. Angle for a Derek Fisher career. If Jimmer is very lucky, at some point in the next 2 or 3 years, if he hangs on long enough, some team will have major injuries and open a Top 6 spot in their rotation for a month or something for him, at some point before he's old enough that nobody will care how he responds. But right now today he will be lucky to even get multiyear offers. I do think he will get offers though, not just camp invites. But everything is left to prove, and nobody is going to tie up their cap just because he used to be Jimmer! in college years ago.
P.S. What would be really helpful to his career is if our front office could somehow convince the NBA to take him as one of the contestants in the Three Point Shootout. Highly unlikely though.