Comment by mewpmewp2

I think SP or similar need to exist for it to be possible to make decisions and prioritise, but issues arise when part of the company, e.g. leadership or managers don't understand that SP are more like guesses with risk and probability involved and they will be disappointed when the end result won't be as accurate.

So naturally people will come to despise it because managers will want a number and to hold you to that number. A strict number can't be given, but intuitive guess which has certain probability of being in a certain range according to experience can be.