I don't want to defend David Guetta since he has some ''ghostproduced'' track imo but I'll compare him and Calvin Harris. David Guetta have made some really ''commercial'' song at times but recently, he collaborated with Showtek, Ain't a Party and B.A.D was really more about EDM than commercial songs imo.
So, Calvin Harris will cash in with his current song but he proves that he could still make some really good ''festival'' song like C.U.B.A and shits