I suspect you're trolling, but here goes. I'll stick strictly to facts and abstain from all moral judgement.

In most of the world, LGBT folk face a number of additional stressors compared to non-LGBT folk. These stressors include some or all of the following:

- Inability to marry partners of their choosing

- Inability to openly date partners of their choosing

- Imprisonment or death

- Dismissal from their jobs

- Abandonment by family

- Loss of children

- and so on

Whether or not you feel those stressors are just or not, certainly they contribute to poorer mental health outcomes, to put it mildly.