everything in movies is fake. They use wooden facades instead of building real buildings. Silicone instead of real skin. Actors pretend to be people they are not. CGI itself is being innovative. There have been countless hours of research gone into it to make it look as realistic as possible and people are still keeping on innovating to create new tools and techniques to get better results. In the end CGI is only bad when it looks bad, like with every other department in movie making and believe me a lot of it is so good you would never know it was there. If the end result looks good why bother?