I have experienced this a bit in the beginning but I am still unsure about reasons. When I first started to search out for treatment protocols and possibilities, I encountered phenomenon of being denied information while at the same time being provided with bits of outdated and incorrect info (being presented as absolute truth). Plus, I was judged quite sceptically and seen as possible freak without people even trying to know me in person. Mind You, that was our online LGBT community (which turned out to be quite transphobic) because trans-community as such does not exist here. And maybe, it is for the better, because there is one thing which learned - quite often, being trans is the only common feature among us and it does not mean or oblige us to become friends or acquaintances. And honestly, there are many inherently toxic issues involved in trans-community but I wont go into that area.
So, in the end, I figured it out by myself and luckily made only a couple of mistakes which did not cost me a lot of money. Yet, whenever I tried to speak up and share my knowledge, I would often encounter my experience being dismissed in favour of older ones (with out-of-date views). But, whatever. We are all sane adults and we can choose our picks.
But I have to admit that I have, probably, acted in the manner that was criticised by the OP. I never deny any knowledge or piece of info, and most of that stuff can be backed up by my experience. Yet, I have turned down several people who basically asked me to provide them with HRT medications. I have to admit, self-medication is quite popular here and people do and will continue doing that - just a simple statement of fact. And I know that some of those who wanted to try were quite desperate but... First of all, I did not want to take up any responsibility for what they might do with HRT medications. Secondly, having it done once, it would sort of become my "duty" to baby-sit them, their HRT and transition... and we all know that MtF brain gets quite addicted to estrogen... I did not want to be stuck with them having my private contacts - also because of that toxicity which I mentioned. They were trans but I did not want to have anything common with them - and that would be quite difficult, if they had my e-mail and phone No. I ended up with giving them general directions and "how to's" and cut all communications off. I am not skilled enough to act as a therapist or take up a support group either (mostly, because that's not what they want - all they want is hormones). Blame me, but that's the life - and it is going to get harder if You will decide to proceed that way and transition. So better start getting used ASAP.