Bet those guards are taking tough shots because of LI offense and/or have low JR.
I bet you'd be wrong.
Here's a team in Canada D1 that plays strictly motion. They're average/above average every season and usually have one of the top 5 payrolls in the division. And every season their 3 high priced perimeter players (Kearns/Simmons/Lavigne) with high JR all shoot under 30% from the arc. Some seasons under 20%. One of the 3 is around 40% this year but that looks like a complete aberration based on his history.
http://www.buzzerbeater.com/team/24945/stats.aspx?season=23&sortBy=rating
Sure there's an argument that you need to get JR up higher to combate the high OD levels but 1: JR is extremely expensive in the salary calculator 2: Based on the terrible % it produces right now, it simply doesn't look like it's worth it's high price. 3: For some odd reason, players with 9-10 JR don't seem to shoot 3's that much worse than players with 16+ JR. That right there discourages many owners from training it.
This just isn't my opinion, this was already being discussed when I joined BB almost 10 seasons ago and absolutely nothing has been done to alter it since that time.