Your GP was very wrong on some many accounts from what you've posted.
Just out of interest, he said that he used hot flushes as an index, if hot flushes are severe, it is likely other symptoms are linked, if hot flushes are not severe, it is likely symptoms are due to something else.
He also said that it isn't a long term fix, and if you start too young, you need to come off it too young too, and dont benefit in the years you really might want it
The first part here- severity of hot flushes- is completely wrong.
Some women have very few flushes but have other symptoms.
HRT is a long term fix for some women. It's prescribed as prevention for osteoporosis and treatment of it, so could be used for life. Certainly right through their 70s and 80s.
The part where he said 'start young and come off it young' is nonsense.
It's sad and shocking that so many GPs are so ignorant about menopause and HRT.
You've been lucky because many women find their ovaries fail 2 years after a hysterectomy. And also to have good bone density.
1:2 women over 50 have osteoporosis.
Have you been tested for the BRACa gene - your genetic history?
Obviously that is something women should have if there is a very strong family connection.
However, after a hysterectomy, you'd only need estrogen. Women who use estrogen -only HRT have a lower risk of breast cancer than the rest of the female population (not on HRT.) It actually reduces the risk. It's the progesterone side of HRT that is linked to BC.
Don't want this to come over as a 'rant' - but just setting out the facts for anyone reading.