I wonder when this "specialist" last read a peer reviewed journal or undertook any education on menopause or hormone therapy.
Also where was any mention of your quality of life or autonomy in the conversation?
I think some of them within the NHS just see hormone therapy (and those using it) as a nuisance because it can lead to bleeding which they have to investigate. Women's quality of life has always been really undervalued as an outcome, and there is a high cultural tolerance for women's suffering within healthcare that wouldn't be seen as acceptable for male patients.
Estrogen has indisputable benefits for quality of life, bones, joints, skin, muscle, pelvic, urogenital, metabolic, sleep and mental health that persist as long as it is used.
There is less evidence specifically that it continues to provide as much cardiovascular protection in older women as it does to younger women, however there is certainly no evidence that currently used MHT products have any negative effect on heart health at any age.
The best thing you can do is educate yourself on the topic, there are plenty of good quality, scientifically accurate resources online that are freely available, then you will be able to make informed decisions regarding treatment yourself without relying on the opinions of those with less knowledge.
In particular the NICE guidelines discourage arbitrary withdrawal of beneficial treatment based on age, and hormone therapy can be continued as long as it is of net benefit to the individual concerned.
I will be on it for life, as there is no age at which my quality of life ceases to matter, or at which I am willing to accept osteoporosis.