Thank you for asking that question.
Yes, I do believe it would be discriminatory on several levels.
Number one, people with mental illness, especially chronic and severe mental illness, can suffer unbearably for decades. Their life course can be derailed. Their personhood can be detracted from. They can be in physical pain as well as emotional pain, and their distress, their suffering, is equally valid, as valid as the suffering of someone with what we term a physical condition.
There's also the challenge that we can't fully distinguish physical from mental in many types of conditions, such as chronic pain, which would be eligible under track two.
To say that someone with a mental illness just shouldn't be eligible, that being a blanket statement where people don't even get the chance to be assessed as individuals in their unique circumstances, to me is very stigmatizing in the way that mental illness has a history of being stigmatized.