I've never read the Daily Mail, but if it agrees with LadyBracknellsHandbagg about the importance of sticking to biological fact, it can't be all bad.
It's interesting that you consider 'people disagreeing with you' as 'wasting your time'. If you spent more time on here - and I suspect you may be here only because of the transfer from AIBU - you'd know that we make our own minds up about things like sex and gender, but we do so on the basis of thinking and researching and keeping up to date with developments.
This seems to annoy people. They prefer to make a statement which they can't back up, and then get irate when they're called out on it, and resort to silly suggestions about 'getting out there' [where do you think we live and work, if not 'out there'?] and meeting trans people [we not only have met them, but some of us have them in our families] so we could get enlightened and 'discover they're just normal people'.
There's nothing normal about believing that you can change your sex. It's not normal to build your life around a basic misunderstanding of scientific fact.
It's neither normal nor acceptable to expect society to rearrange itself around your mistaken take on biology.
Knowing that human sex is binary and immutable doesn't depend on whether or not you've met transpeople - but maybe AubernFable thinks that it is only people who have never met a transperson who believe that human sex is binary and immutable.
All those scientists and physicians and geneticists and biologists are so wrong about human sex, XX and XY chromosomes, gametes and all that - probably because they have not followed AubernFable advice, and need to there and just speak to a transgender person, instead of doing all that boring fact-based scientific stuff..