I have a family member with schizophrenia, bipolar depression, and substance abuse issues (alcohol, weed, and adderall).

Even when they are seemingly in a clear state of mind, they are in denial about everything. They've gone through psychosis for an extended period of time several times over the last few years, and is in one now (thinks the Tv was talking to them, thinks their job is fake).

Nothing anyone has said has actually made them seriously consider treatment. They've been involuntarily committed two or three times, and pressured into "voluntarily" going another. They begrudgingly got an invega injection because they lost custody of their kids, and that was a condition for visitation, and they agreed to counseling though I can't imagine it's been very effective.