I see him shooting 3s at 32.9% this year. But your basic point stands, that is not good enough for an NBA point guard.
https://stats.gleague.nba.com/player/1631120/
Yeah, I think of it this way (not just about Davison but in general). We all have a kind of intuitive understanding of the following, but it might help just to put some numbers on it:
At guard height (6'1-6'5 roughly), we're talking about people 1-2 standard deviations above the norm (men are avg 5'10" with StDev 3"), or roughly 2% (6'4)-15% (6'1) of the male population, 1 guy out of every 6 down to 1-every-50. At wing height (let's say 6'6-6'9), we're at like 3-4 standard deviations above the norm, down to 0.4% (6'6) - 0.01% (6'9) of the population, or 1 guy out of every 250 up to 1-out-of-10,000 (!). At center height, call it 6'10+, it's 4-5 standard deviations, 0.003% at Z= -4.0 (6'10") and falling fast, one out of every 40,000 men or so. 7-footers far rarer than even that.
And in those 3 rough groupings,
there are about equal numbers of NBA jobs available. Maybe slightly fewer bigs, but guards and wings are in roughly equal proportion. Out of the 450 active roster positions, it might be like 170 guards / 170 wings / 110 centers, give or take, and acknowledging the imprecise boundaries of the groups. But even so:
very different than the population distribution.
This is why we see the stat that if you're 7 feet tall, there's about a 1 in 6 chance that you'll play in the NBA. You don't have to beat out very many other people your height - in fact, given how many people at that height are in ill health in general, not up to any sort of athletic activity, not interested in the career, etc, probably at worst you're talking that 1 out of 3 people that height who seriously pursue and train basketball, end up on a roster.
If you're of NBA wing height, you have to beat out a goodly number of other people of similar stature. There aren't a ton of guys at that height, but many will play basketball, enough will be healthy and athletic. You might have to beat out the next 100 players of your height in order to make it onto an NBA roster. Think of how many college teams there are with guys at that height who have pro-hoop ambitions every year. The competition is way more fierce than it is for bigs. But the journey is certainly made a lot easier for you by having been born 6'8 or whatever.
If you're of NBA guard height, well, goooood luck. There are an absolute assload of men of that height out there, with their mere size not usually causing big health problems the way freakishly tall people are. You might have to be the best 1 out of the next 10,000 players or even 100,000 players to make it to the NBA. It's way, way easier to get into Harvard or any other insanely-competitive admissions process one could name, than to make it to the league as a guard. To even get anywhere near competing for one of those spots, you need to be an absolute freak in many ways other than height - determination and work ethic, certainly (think Payton Pritchard's
workout videos), natural creativity and agility, but also every other skill around the game, most of all shooting. There is basically no room for error, no room for having some part of your game that you need to work on - because if you're weak at it, the team can find somebody who isn't. The level of competition is absurd, and thus the floor for performance by those given a shot to earn a roster spot is very high.
All of that to say, JDD can look out there like someone with NBA-level skills at passing, ability to defend G-leaguers, and even able to score in the paint against G-leaguers. But in today's NBA if he lacks outside shooting, he's dead. Or he's Ben Simmons, a 6'10" guard who can defend 1-5 at an all-star level, pass at an all-star level, read the game in transition incredibly well, and (used to be) score around the rim a little. He's the exception who proves the rule, because you have to basically look like Ben Simmons in every other area except shooting in order to get away with shooting like Ben Simmons.
JD shoots better than Ben Simmons, but at 6'1" he needs to be Payton Pritchard to stick. And I have a hard time seeing him get anywhere close to there. If he was 6'8, he'd probably be on a roster already.