I'm saying the domestic chances tend to be less easy/clear cut due to the style of defending we generally face. Blocks, restricted to distance shots (which he isn't the best at), etc which would naturally lower stats. It'd be much more interesting to me to compare his goals to chances to McCoist or Boyd for example. Ally in particular missed bucketloads of chances that sometimes looked easier to score but whenever truly needed in tight or important games he'd stick his, and our, only chance of that game away and win the points/trophies. He was the best striker we've ever had for the reason above imo but his goals to chances ratio must've looked absolutely chronic over a season at times. It's about perspective and what they bring as a complete package, not where one particular area sits on a graph.
If you're asking if Morelos is as clinical a finisher as Defoe, for example, then the answer is obviously no, not even close in terms of sheer composure. Very few are. However, if you were to ask if Defoe was as good in the air, or at running the channels or holding off defenders with his back to goal etc as Morelos then the answer to that would be an equally emphatic no. If Morelos had Defoe's composure on top of all of his other strengths then we would never have had the privilege of watching him play here. He scores at a healthy enough rate for me. Long may he do so.