Well, the reason why the US healthcare system is so screwed is because of the law; after all, it is pretty much the same "big pharma" countries that operate everywhere in the world. Therefore, going back to "The US healthcare system is screwed so what law is in effect doesn't matter" is not exactly fixing anything.
Obamacare had consequences, and so will the AHCA... what those consequences are is difficult to say because the legislative process was sped up so nobody would be able to learn about them in full but it seems like it will mean a lot of people will lose coverage.