no...but if you can't put in the effort required to learn to beatmatch (which is pretty easy) you probably are not going to have the patience or work ethic to develop any of the other skills requisite to being a good dj
frankly i think the sync button just takes the soul out of the mix. it's tough to define but i don't feel right when playing on equipment with sync.
back in the day, DJs used to jesus pose when they were about to pull off a double drop. they would show the crowd their hands so that everyone knew they were secure in knowing that the mix was going to sound exactly right. nowadays it just shows that you are a clown