Just a little math:
Say a team shoots 35% on 3-pointers and only shoots 3s during the game, so on average 65 shots. That equates to 68 points. Not bad.
Do to our lack of shooters, we struggle making 3s, so we would need 35 2-point baskets to win, or a large free throw margin in our favor (due to being a bad FT shooting team we need a lot more free throw attempts). We would need 78 shots to make 35 baskets (using a 45% FG%, we ranged from 37% to 51% over the last games).
So we need 13 more shot attempts, those come off of steals and blocks and turnovers, but when we also have 15+ turnovers a game, then we struggle getting off 78 shots.
To conclude, holding teams to a 30% 3-point percentage is good, but if the team jacks up 3s all game long because they know they can't compete with our bigs inside, then we have problem.
That's all. Defend the 3. Please. Let me know if my math is wrong.