I'm fairly open-minded to a critical take on trans issues, so I gave the linked podcast a listen, and I just want to report back that it's pretty straight-up conspiracy theory thinking. For example, the author of the book notes that it was only two weeks between the SCOTUS gay marriage decision and Caitlyn Jenner's cover on Vanity Fair - saying it was "obviously coordinated". There's talk of "putting pieces together", etc. If you're not conspiracy theory inclined, you can save yourself the trouble.