No, spaying and neutering is done to prevent unwanted animals from becoming more common than they are. Yes, it hurts more. Probably more than docking. But it has more purpose (and a greater purpose) than docking.
Docking, if it's done for work, is fine. I'd rather dock the dog when it's a few days old than remove a necrotic tail - and dealing with associated infections - that was damaged from being drug through the brush (or rubble or whatever you're using your dog for).
But how many people with docked animals do you know that work their dogs in such situations? I'd be willing to bet that in 90% of the cases (and I'll bet it's higher) in the US (probably elsewhere as well) it's done for purely cosmetic appeal because 'that's how it's always been'.
That, I don't agree with.
You just said how unnatural docking was. So, I gathered that you were against anything unnatural being done to their bodies. That's why I brought up the incongruousness of being pro-natural when humans have done astronomically worse things to dogs which are not natural. So, which is worse, breeding defects that harm dogs or docking tails?
I just don't see how a docked tail can be considered 'standard' when it's, well, not.
And if a genetic disorder, especially a detrimental one, was considered standard in a dog breed I wouldn't support that either.
But then again, a ton of people love those short little bulldog noses because 'that's how it's always been'.