"why would you wish to test positive for an incurable illness?"
because we're sick and a positive result is the only thing that will make doctors willing to help us. that's why.
and in the rare case that they do they underestimate how bad they are
and in the rare case that they don't they still don't want to help
it's the thing that gives us access to treatment, supports and accommodations.
we already know that we're sick. a diagnosis isn't news. it's confirmation.
but it's well manageable and treatable and here's my big info thread on it, might be worth looking at