Trust me from a medical POV this is NOT a big surprise, quite the contrary in fact.
It's one reason why when I originally transitioned, many decades ago, I made very sure I got SRS extremely quickly. Its basic science that the longer you spend with two competing endocrine steroidal supply systems (your original equipment plus the pills/patches/injections) the more you will risk knackering your liver, your pancreas, your kidneys, and just about every other organ system in your body.
My personal view, based on what I now know of medicine, is that I personally would not think about transition or begining HRT unless I was absolutely 100% certain of achieving SRS within one to two years.
I completely understand that not everyone desires surgery, thankfully I did, but in any case, to my mind the non surgical choice would have represented an unacceptable risk to my longterm systemic health and therefore as a personal opinion, had I not been willing to go the whole way I would simply never have started the journey at all. Instead I would have found other ways to express my identity.