According to the .gov stats, they are 25% more likely than anyone else to attain mental health therapy, they are also less satisfied with their lives and also receive confrontation on a regular basis.
How is this a stable environment for a child? If there were a non LBGQT person applying for adoption and they have a history of mental health and a potential unstable environment, would they be able to adopt? I think the answer is no, seeing as the the child up for adoption is more susceptible to things like abuse and mental health issues as it is, and this will be adding fuel to the fire.