Those are usually DJs at the low end of the scale that only get spots because they play free or are friends with someone… this is not where it is going. In fact the ways to express yourself creatively have increased hundred fold when controllers came along compared to old CDJ stuff. It takes some time for those things to catch on, but the DJ booth will be very different in 10 years (except for backwater clubs…). Look at the new Denon pro gear, it is basically a modular controller with build in mini-laptops.
However I have to say one thing: There are some songs (after 20 years) that are my top favorites of all time, that I also do not need headphones on, but you would recognize that transitions would be flawless nonetheless hehe