I don't know if you are being sarcastic or genuine in the first bolded part, but if you are being sarcastic, you are barking up the wrong tree
As to the second bolded part..... you wouldn't possibly mean hidden just like the last two years right... behind the same two guys? Hear me out. Ben has had 2 years, and I admit he has improved (who wouldn't improve after that first season), to show that cohesion with that first unit. In the early part of this past season, I thought he finally figured it out. He was shooting well and really tried on defense, to varying degrees of success, but still tried. However, with the collapse of our team, his game collapsed just as hard. Clearly, there is an association with that, but it's not like he is our superstar. His game shouldn't fall off that much. He is our spot up shooter, the wing guy on fast breaks, and our designated "defender." He should be relatively consistent, but he isn't. He's still all over the place and has been top 3 worst starting SG in all of the league for 2 years running. I want to see him improve because he can/might/will be huge for us at some point or another, but this season is so huge for us that I really cannot bring myself to rely on him.
At this moment in time, Bellinelli is better. He's not even 10% the athlete McLemore is, but he is wiser, stronger, better at shooting, passing, dribbling, and understanding the team game (he's a former Spur, the literal icon of team basketball this decade). If we plan on being serious about making the playoffs, those open threes that Ben loves to miss need to be makes. Marco does that very very well. If Marco starts, Ben would feel absolutely no pressure to perform and we can rely on him for stretches, instead of the entire game (which he has not been ready for). We can mold him from the bench and if benching lights a fire under his butt, then we will only benefit. He is our SG successor, so he will play, but I am not sure having him start is the smartest thing to do.