Clinching in and of itself is an art form
And you can see the clinch in other martial arts such as Muay Thai and Judo
Granted there are no submissions in boxing but the clinch in and of itself I believe to be another martial art, it's not about strength, it's about leverage, positioning, balance, etc. You can be a crappy boxer but still win with excellent clinching techniques. All I'm trying to say is there is a lot more to boxing than just throwing a punch, it's more MMA than one singular art IMHO.