Maybe this will help communicate my confusion better as to why you're saying, "This isn't a time to experiment" and "I know you want diversity, but" in response to what he said.
I mean, he basically said, "At one point in the past, I wanted Glover over Garfield, or some other minority playing Peter - but now we have someone who is perfect for both Peter and Spidey and I want him to play the role." "Someone" is the person mentioned in the title. He might still want a minority to play Parker if he didn't have this option, and then your post would make more sense as a response.