I recently learned that DJs today just press a button to mix two tracks. Growing up mixing and beat matching used to be a skill to be proud of. Now it's just a button. So I was told.
There's no skill involved in pitching the two nearly-identical-in-BPM tracks and nudging them into rhythm. Put any sync button DJ in front of a proper CDJ setup, give them a couple of hours to practice and they will be able to pull off a set. Most importantly: it is the least important part of the job. Nobody in the crowd gives a shit about whether or not you're using the sync button, it makes no difference to them.…
Please observe Grimes at Cochella: https://www.youtube.com/watch?v=E01QyNHBpcc