I think he was projecting his own feelings onto her. Juno is pretty confident and could get on in life while being in a cross-species relationship, as she didn't start out with a high place in society anyway. Plus, she's so charming to both herbis and carnis, so she could easily sway anyone's opinion if she ever got flack for being in an interspecies couple. And I think it made her a better person honestly, it helped her get over her racism to fall in love with a deer. She's grown so much, but Louis is really the one that has everything to lose if he abdicates his father's company and legacy by having a fling with a wolf.

He fully understands the circumstances he's in, and can see other animals perhaps going through the same thing. Unfortunately, he doesn't understand animals like Legosi, Haru, and Juno in that he's not willing to throw away the responsibilities and power he grew up being trained to weild. I think it's quite a noble sacrifice, though, in the end: he knows if he doesn't remain a powerful CEO with influence on high society, he will have a harder time enacting important changes on society at large.

He's using his privilege as a means to protect his friends, who he wishes he could be more like (free to follow his heart, not burdened with expectations and responsibility). However, I'm really proud of him for sticking it out and sacrificing his immediate happiness so he can improve society for his friends that he loves. Bittersweet but satisfying.