Arithmetic without a cite isn't useful here. You have quoted .5% and 10% and on the other side "how much they've intruded into the public sphere" again with no numbers.
I can't vouch for the veracity of this figure from the UK, but an increase of 2500% in 9 years sounds like an epidemic.
The number of children identifying as transgender is on the rise. Referrals to the NHS’s Tavistock Gender Identity Development Service have increased by an astonishing 2,500 per cent in the past nine years. Psychotherapist Bob Withers is concerned that large numbers of children are being transitioned unnecessarily, and that discussion of this phenomenon is being closed down by trans activists.
https://www.spiked-online.com/2018/11/30/we-are-experimenting-on-children/Dr Withers expresses concern that many people are being transitioned unnecessarily, and that people who desperately want to transition are receiving coaching so that they can give psychologists the answers they want to hear to approve transitioning. He argues that while people may be strongly convinced that transitioning is the only answer to their problems, Dr Withers argues that for some or many, gender dysphoria is a symptom of other psychological issues that won't be addressed by transitioning. And, he is concerned that psychologists may be approving unnecessary transitions out of fear of being labeled transphobic.
Well, yes. How can anybody tell you how YOU feel ?
I think telling people they are lying when they express their feelings to you, absent of other information, is arrogant and unhelpful.
Argus might "feel like a panda", but that doesn't mean the zoo is going to let him into the cage to eat shoots and leaves and waddle around with natal (Assigned Panda At Birth) pandas.
Rachel Dolezal is apparently convinced that she is black, even she has white parents and grew up as a decidedly pale little girl. Nobody accepts her self-identification as a black person, even though she changed her appearance to a degree that she was able to carry out the ruse for years.
Rachel Dolezal: "I just know that on the inside, I'm black."
Progressives: "That is so
**** offensive! You grew up with white privilege, you don't have any idea what it is like to grow up as a black person in America. You're laying claim to history and heritage and experiences that you can't possibly understand! This cultural appropriation! You're turning black peoples' lives into a
**** cosplay!"
Trans-identified male: "I just know that on the inside, I'm a woman."
Progressives: "Obviously! No problem!"
-k