I actually agree with you in many aspects. Something new that is being taught in therapy training is that we have to be aware of systemic issues that are contributing to someone's mental health.

Example: someone is suicidal and feeling hopeless. Do they have clinical major depressive disorder? Maybe, but if we ask "how are your finances doing?" And they say they work full time at Walmart and get paid $10 per hour and have 3 kids... Yeah it makes sense why they feel helpless and suicidal.

For this reason, therapists and mental health workers have a duty to advocate for progressive social policies.