What people fail to realize is that the TCG is rated 6+. This doesn't mean that adults can't play it, it just means that business is business. Charizard,Mewtwo,Eevee,and Pikachu are all very famous Pokemon and will receive multiple prints in each era to keep those 6+ kids coming back.
I bought 4 packs and pulled Tapu Koko GX. I put them on the TCGO and got Turtonator GX, then a full art Sylveon GX. I traded the Sylveon for 6 more packs and got hyper rare primarina, and a full art Tapu Koko.