About 3% of people 50-65 identify as gay. 4% of 18-29 year old identify as gay. 1% of 65+ identify as gay. At most, the rate increased 4x over the span of half a century: https://www.pewresearch.org/short-reads/2023/06/23/5-key-fin...

Left handedness increased from about 5% to 12% over the span of more than 60 years: https://www.datawrapper.de/blog/history-of-left-handedness

By comparison rates of transgender identification among minors has increased by a factor of a hundred over the span of just 10 years: https://www.researchgate.net/figure/Rates-of-newly-recorded-...

We're talking about an increases that are multiple orders of magnitude greater, over a fraction of the time span.