Earlier quoted context omitted.
I agree that your hypothesis is a possibility. But, what type of advantage does identifying as LGBTQ provide that is not in being a heterosexual?
Over representation and privilege, eg, easier admissions to college or hiring. We haven’t ended bigotry, but under the guidance of Democrats and Leftists, created a new system of bigotry — using euphemisms like “equity”. Which is the same reason White students lie about their race. https://thehill.com/changing-america/enrichment/education/57...
For example if universities would take factors like poverty and access to educational resources into account, rather than using racial identity as a inaccurate proxy for this, they'd likely achieve more equitable outcomes, in helping talented but disadvantaged individuals gain access to higher education.