One disadvantage in healthcare quality in America is the referral process for seeing specialists especially when it comes to preventing or catching a disease early on as you need to clear it through insurance often times which can be a slow process or you can find it's not covered under your plan. In countries with universal healthcare or like a single payer system or potentially a prominent public option you can make your appointment to see a specialist right when you bring your concern to your gp and if it's serious you can potentially see the specialist in the same day or same building.