The laureates are looking at it strictly through the lens of science. They are correct given the logic and brief history of experiments to date. Not qualified to fact-check it myself so I'll believe them.
However if they are being 100% honest they must admit they ignore the issues around how that science is being applied and used for real business. For example it enables the establishment of monoculture in the food supply puts it at high risk of infection. As went the Gros Michel so goes the Cavendish soon. Is there enough genetic diversity in the animal food supply to resist a new superbug? Of course there are other issues with the big business around control of the GMOs and the close relationship they have with government.
Only one question - if GMOs are truly safe then why can't they just be labeled as such in the store? I like to know my ingredients and I'll choose. Why are big business and government trying to hide it?