While I certainly won't disagree with your opinion, there are instances where I need to get better at parrying, especially the way I want to play with Necro. Far too often do I get severely punished by crouching shoto's / nimble characters and I can't even parry certain projectiles consistently, leading to even more needless damage. Especially because I sometimes play pretty defensively without turtling.
Thing is, I don't necessarely want to parry everything, or even certain specials, but I feel parries could be a big help to the way I play. I like to (try at least) confuse people and attack in ways the opponent wouldn't expect me to. Giving the impression that I can't parry for shit will (in theory) help me catch people off guard. If I were to parry at an unexpected moment (for instance, when the both of us have little health left), then there's definitely a window of opportunity for me to inflict potentially significant damage if I can follow up with a decent offensive. Don't think I'll bother with jump-in parries with Necro though (often use his Air Drill as a part of the above strategy), but I am going to try with aerial parries. The latter should be beneficial to characters with Shoryuken-ish moves.
Throwing normally isn't a problem, so I don't think I need to practice a whole lot with that. Maybe you can see for yourself how I play on Xbox Live, if the latency issue doesn't bother you that much / wreck your gameplay? The sessions with LakeEarth were really smooth, despite the both of us basically living in opposite ends of the world.