Whether it be a penchant for perfectionism, adventure, knowledge, competition, masculinity, femininity, spirituality, creativity etc they all demand expression. The reality is you can't push back the tide of who you really are without there being damaging consequence
That is bullshit, quite frankly. We cope quite normally without expressing every aspect of our personality, and that personality isn't fixed. It changes throughout our lives.
People change who they are all the time. Our brains' plasticity is well documented. What we think, want, believe, value, enjoy, admire can and does change.
How we react to the world changes too - and thank goodness for that, or all those with poor mental health would be condemned to live like that forever. Fortunately, many of us recover, learn how to alter our unhelpful ways of thinking and interpreting the world, and go on to live happy and engaged lives.
In treating trans-identifying patients in the opposite way to other patients in distress, the article's author was musing that we do them a disservice. We treat them as if their wish to present as someone (or something) they are not is a reasonable route to go down.
We'd rightly decry practitioners who took that approach to any other cause of mental distress. He gives the example of OCD but anorexia, body dysmorphia, body integrity disorder or believing you're the Queen of Sheba are the same... We don't pander to the mental illness, we challenge its roots and help the patient accept themselves in material reality.