The funny thing about Fede saying he cut the trailer... we had confirmation that a production house had made it. So maybe he did a rough cut and passed it on to the studio, but he didn't make the whole thing himself. Marketing is funny, it's the same as that "no cgi" talk with films like Top Gun. They used a shit ton of CGI on that film, and they will be with Romulus too, even likely replacing practical effects at times. They're going to have to.
Not sure why they gotta fib a bit to make it sound cooler. Just tell the truth!