Guidelines are a good starting point but shouldn't trump clinical judgement, patient autonomy and shared decision making.
A negative hysteroscopy is good for at least 6 months, and if you have never achieved amenorrhea then the more sensible option would be to try a sequential regime.
There is also a real double standard around hysteroscopy guidelines and pressure to come off treatment in women on hormone therapy, whereas if you were on the mini pill for contraception, which is indicated up to 55, you could bleed and spot irregularly until the cows come home and not trigger a hysteroscopy.