Pandemic? Please don't tell me you're actually comparing gender identity to a disease.
You're right though, gender identity is a state of mind. It's a very individual thing, and I won't ever pretend to understand it, but at the same time whatever someone feels is a totally personal thing that no-one can say is right or wrong. We've spent years telling young people what they should or shouldn't think, what's the harm in educating them that some people (including maybe themselves) feel differently inside to others?