Step back a bit and examine why homosexuality is promoted:
it destroys the value of the traditional nuclear family.
This is the underlying effect (and goal) of 99% of leftist policies.
I agree, but look at the point they have chosen to argue about - life span.
They can’t accurately hold ground on that one.
Gay men get sick at a higher rate than the rest of the population.
Gay men die younger.
These grandparents will outlive those gay men.
Take the argument and throw it right back in their faces.