The most critical flaw in this piece imo is a fundamental misunderstanding of the nature of sexual offending by men, particularly voyeurism and indecent exposure. Self-declaration is a MUCH lower barrier than current requirements for these motivated offenders (who are not rare)

Recent experience with historical sex offence cases show how far the most motivated serious offenders are prepared to go- including getting specific lifetime jobs and volunteering positions. These are a relatively small number of men. Indecent exposure however 2/

Is a crime that roughly 3 MILLION women have experienced since age 16. Well over 100 THOUSAND offences were committed in the last year (official gov stats https://t.co/FxTUosXaFj )
3/

What percentage of these offenders would pretend to be trans in order to offend? Well, you might argue that a very large proportion won't, but what is the barrier proposed under self-ID? Filling in a form. There's no commitment to a process required 4/

And (this is key) there are women's spaces where it is normal to be unclothed. So these men can indulge their offending without any realistic possibility of conviction, AND 5/