If we're going to talk about lobbying, then perhaps we should talk about Christianity as a mental illness. After all, belief that there's a man in the sky who will punish you after you die if you don't obey him only becomes 'acceptable' if said 'man' is called 'god'. If said 'man' is called "Steve" then you'll most likely be locked away. Were it not for the political power of the church and how common religion is in our world, Christianity would certainly be classified as a mental illness.
It's worth noting that demonstrably, homosexuality does not impair judgement, stability or general social capabilities. Religion on the other hand, has (at least in recent years) shown time and again that it impairs the judgment of individuals. They act in accordance to a 2000 year old book, rather than their own judgment. And religious people (particularly evangelicals) have shown themselves incapable in social situations with people who aren't like them. It's only because their beliefs are common, that it's not classified as a mental illness (compared to homosexuality, which was determined not to be an illness because it does not fit the standards of mental illness, rather than how common it is.)
It's worth noting that demonstrably, homosexuality does not impair judgement, stability or general social capabilities. Religion on the other hand, has (at least in recent years) shown time and again that it impairs the judgment of individuals. They act in accordance to a 2000 year old book, rather than their own judgment. And religious people (particularly evangelicals) have shown themselves incapable in social situations with people who aren't like them. It's only because their beliefs are common, that it's not classified as a mental illness (compared to homosexuality, which was determined not to be an illness because it does not fit the standards of mental illness, rather than how common it is.)
"Tradition" is just a word people use to make themselves feel better about being an asshole.