I agree that CGI has gotten way better over the years but some things just don't look as good if it was instead done in real life. I prefer humans acting as orcs with lots of make-up on over CGI orcs any day. Humans still look and feel way more natural than the best CGI you can get.
Oh, i'm not denying that, there are occasions where actors are better than CGI, i'm just saying that CGI has gotten better