If you miss with that kind of hook against a good fighter, you just multiplied your chances of getting knocked out cold! It's a risk vs reward thing. The payoff is good, but the risks are absolutely devastating. If you've watched enough fights, and seen enough guys getting absolutely destroyed after missing with one of those, then you know not to teach anyone to throw that punch. When you miss with a standard orthodox stance left hook, you're still in position to slip and slide any counters. But when an orthodox fighter misses with a right hook, you're all squared up with only one option of avoiding counters, and that's ducking way low while still squared up and putting yourself completely off balance.
My right hook has incredible power in it but I can only throw it up close. I can actually lead with it, but I have to leap in really fast and stand square on as I do it. I think it's a good weapon in you're arsenal but you have to make sure you perfect it before using it.
Ultimately I would say it is a haymaker. Strategically not the best to use but if the opportunity is there it can generate as much power as anything and close the show.
Funnily enough the only times I can remember seeing it being used successfully was where the Punch knocked the opponent out so they couldn't counter anyway! (Lewis-Rahman II, Pacquiao-Hatton and Hopkins-Trinidad)
Many southpaws have brilliant right hooks but that's they're lead hand, they often have great left hooks aswell like Luis Collazo or Manny Paquiao (even though we only really saw that in the Hatton fight most recently) Tyson and Jones Jr. used great right hooks for orthodox fighters too. Jones would often throw it when he was against the ropes, land it very accurately and then take a leaping step to the right almost standing right behind his confused opponent waiting for him to turn around and face him again.
Yep, a lovely left hook it was aswell.... but the two knock downs prior to that were right hooks in round one if I remember rightly.