I was reading a feminist group I'm a member of and someone posted this article which comes from lascapigliata which some of you may be familiar with. lascapigliata is a feminist and a doctor and often comes at this with a medical perspective. In this case a trans man (TIF) was given inappropriate treatment due to gender identity rather than biological reality which led to further issues resulting in needing a transplant.
I found it interesting and demonstrative of why biology still matters very much. If you are interested you can read more here:
lascapigliata8.wordpress.com/2018/04/29/transgenderism-and-unethical-medicine/