Ingram is a good player. He has NOP in the playoff hunt as their best player. He is not as good a Brown though even when healthy and has more of a durability concern. Plus, to me, his game is more SF than SG (which I know is subjective) so he is not as good to pair with Tatum. I don't think I am undervaluing Ingram, I just don't think a trade would make any sense.
As others have said, if it comes down to Brown demanding a trade, getting Ingram and something would not be horrible but it is not a trade I would look to do. More like if that was the best trade you had to settle for, it would not be the end of the world.
this is another issue that strikes me as contrary to Moranis' big talking point about Brown --> that Tatum is best at SF and Brown's style impedes Tatum's game. Ingram isn't a fit at SG or PF so he has to bump Tatum to PF which goes against Mo's philosophy of Tatum at SF AND Ingram's offensive game is less effective than Brown's in terms of being able to score so not seeing how he's more compatible with Tatum. also, Ingram's ball handling ability is moot since Tatum typically has the ball in his hands in this offense.
I am not trying to single out anyone for their opinions but I don't think Brown is impeding anyone. I agree that Tatum's natural position is SF. And if you ask him to play any other position, it is not going to be the best for the player or the team. Ingram and Brown can both play either SF or SG but I see Brown as a natural SG and Ingram as a natural SF. The difference isn't huge but in my mind, you want your best players playing their natural positions.
For NOP, Ingram played most of his minutes on the floor with Herbert Jones. Jones probably assumed more of the guard role and Ingram more of a SF role. I think if we did trade for Ingram, he would probably play as more of a guard, not his natural position but not the end of the world. Smart-Ingram-Tatum-Horford-RWill would be a good line up but not as good as the line up with Brown.
And I know that it is just semantics but I don't think Tatum ever plays PF. The team just chooses to play with 2 guards (Smart and White), 2 wings (Brown and Tatum), and a big (Horford). Nothing wrong with that, it has actually been a good line up. It is like when a football team plays with 2 TE or 5 WR. You don't say that the second TE is playing WR or that the 5th WR is playing RB. It is just how the team is lining up for that situation or match up.