All he was saying was the process was good. That's all you can control. Sometimes the results aren't there - e.g. you can generate a lot of open looks but the shots just don't fall. It was a dumb thing to say simply because NBA games aren't won with process they are won with results but I get it from a "we don't need to make a ton of changes" perspective. He would have been better off saying "We need to make more shots" and everyone would have nodded their heads in agreement.
I think there's an injury risk factor with a pitcher you don't necessarily have with a position player. I think that needs to be accounted for in the Burnes trade.