Old school DJs take pride in their ability to use turntables and master the art of vinyl manipulation, tempo matching, beat matching, and mixing a set without using CDs or computer software which help a lot.
Yes, it’s a skill which needs a lot of practice to acquire.
However, there’s so much aggressiveness out there from old DJs who feel antagonized by younger generation DJs with their computer software. Old DJs will assert that any DJ who uses a computer is no real DJ.
And my answer to this is: do you use a lighter to light your cigarette or do you rub wood together?
Yes, it’s a skill to use turntables (not rocket science, though), but it’s totally useless these days, unless a music venue wants to have that as part of a show. But if effectively and creatively mixing a set, following the audience’s moods and being versatile with the amount of music you’ve got is what a DJ does, then not only classic DJ-ing is useless, it will never be as good as new style DJ-ing, when computers allow for easier mixing, less probability of mistakes, much more creativity, much more music carried around, etc. The audience cares about results, and not what needlessly difficult archaic method was used. Efficiency and effectiveness are key.
So again, are people who use lighters, and don’t rub wood together, not real smokers? Are people who use ultrasounds, and not a stethoscope, not real doctors? Are people who use autopilot, and not fly stick all the time, not real pilots? Are people who use calculators, and not pen and paper, not real mathematicians? Are people who use pen and paper, and not calculate in their minds, not real mathematicians?
So before badmouthing competition, make sure you get over yourself first.