BI and JJ

I see a lot of people saying BI needs to be the third option if we were to trade for him, but I don’t really understand why. Don’t get me wrong JJ is a beast and he can put up numbers but he can’t create for himself and lacks a consistent move or jumper. BI with his iso game can open up the floor as well, which will make JJ’s job attacking downhill a lot easier or leave people open at the 3pt line.

I think they can coexist as second options or sometimes first options depending on matchups.

for instance, when trae is having a bad shooting night or the opponent is doubling trae, JJ and BI can take the ball and attack the rim or pull up for a 2 - maybe a team like OKC that has cason, shai, dort(although they have a good interior defense as well). for a team like the bucks that has giannis and brook lopez in the paint, BI pick and pop would be a better option than trying to attack the rim where tall centers and forwards are positioned.

I’m just curious as to why people think having BI will make the chemistry bad. Trae Dyson BI JJ OO sounds like a solid lineup to me.