I also disagree.
1. Suicides and despair among people whose sexuality doesn't conform to a norm may well not be rising. That is no excuse for ignoring it. It is utterly wrong and unjustified that society should marginalise us because of how we feel.
2. There is little doubt that social attitudes won't change quickly. The pressure for young men to be tough and successful with women, the pressure for young women to bag the best guy and make him a loyal partner, these are part of the way society thinks.
But it is completely unacceptable that our government should marginalise us through its regulations. That we should be denied the same rights as everyone else because of our feelings.
Governments have been progressing over the years. They no-longer put people on different levels according to their race. The disabled, certainly here in Europe, have enormous amounts of new legislation and such, outlawing stupid discrimination.
It is, I suggest, understandable that someone confined to a wheel chair might not be given the opportunity to become a front line soldier. It is completely unacceptable that someone should be discriminated because of their race.
It is equally unacceptable, that someone should be discriminated because of their feelings or sexuality.
Removing irrelevant discrimination won't solve the problems faced by those of us with different feelings, over night, any more than it will cure racism or patronising attitudes toward disabled people.
But that is not a justification to maintain this irrelevant discrimination.
Addition.
We can't really know how many people, who consider suicide, do so because of their sexuality.
Like many others, I seriously thought about it. For many years, while I wasn't seriously considering it, I held my life in very little value and wouldn't have cared too much if it ended. My only caution, to be honest, was not wishing to impose it upon others.
If I had died, would anyone have thought it was because of my sexuality? The problem is that I have been unable to express my sexuality. There were no facilities for me to transition. I was reluctant to come out as gay because I didn't want to attract the inevitable promiscuousness that is associated with it. And, sadly, it is.