You're completely glossing over the fact that it's a proc-based job. The engagement relies on responsive gameplay. Only 4 combo buttons, sure, but you don't know how many you're going to be using or which ones until seconds before you need to use them.
You can say that "only 4 buttons" for the basic combo is "easier" than something like DRG, which has twice as many, but DRG's chain is always 1, 2, 3, 4, 5, 6, 7, 8, 5, 4 repeating whereas DNC's is either 1, 2, or 1, 2, 3, or 1, 2, 4 or 1, 2, 3, 4 (or 1, 2, or 1, 3, 2, or 1, 2, 4, or 1, 3, 2, 4, depending on playstyle).
It's just as easy to say DRG is easier just because its rotation is prescribed whereas DNC has to keep an eye on procs and react accordingly.
Ultimately neither assertion is correct because which is easier varies by player - some players find prescribed rotations easier to execute than procs - some don't. The entire argument is asinine.
