@Fraudornot
"Why people think it's natural for hormones to reduce during menopause?"
Well, because it is what happens in natural circumstances, hence the name "natural". Not all hormones reduce during menopause, just sex hormones, and the clue is in the name. They have evolved to shape our bodies and brains for the sole purpose of reproduction, hence they are no longer needed in the same amounts after the reproductive age. But during the long evolution process they have acquired some secondary functions, and those are the ones that the HRT advocates think should keep functioning 'forever'. There's nothing wrong in trying to overcome natural processes, but the statement that without HRT a woman will have a higher probablility of having osteoporosis, dementia, heart disease, diabetes and depression (Louise Newson's words) has not been scientifically established.
Regarding NICE guidelines, can you post a link to the document that "recommends HRT with no time limit"?