If one considers that the first part of (LGBTQIA+): Lesbian, Gay, Bisexual, Transgender, Queer, Intersex, and Asexual, which is Lesbian, Gay, Bisexual, as a sexual preference stemming more from DNA, something that people are born with, then the addition that other groups try to add, TQIA+, to benefit from its already accepted social view of LGB.
Principally because this addition include groups that might be considered as stemming from a 'mental disorder', or from the influence coming from left wing propaganda, then their position is that these two groups should be looked at separately. LGB, hopefully accepted in many societies, not all of course, amalgamated with mental conditions...
Some LGB groups have already dissociated with the other groups that are trying to get added acceptance by tagging along..
The more the added groups (TQIA+,) make noise, the more it will give rise to TERF.
SHHHHHHHHHHH