I agree with you on both points, but to me, garland should be on the bench subbing in for delly, not the other way around.In this particular instance, the reason people are talking about benching Sexton is that Okoro is the new shiny toy, but they don't think he can play the 3. They want to slide him to the backcourt, and benching Sexton is the way to make that happen because neither Sexton nor Okoro is a capable PG.
Now, it has been talked about in the past that it makes sense to stagger Garland and Sexton, not necessarily to make either one look better, but to make the team look better. Whether you want to start Delly and bring Garland in to play the last 16 minutes of each half, or whether you want to find a capable SG to do the same deal with Sexton, I think it would be beneficial to the team.
But of course, garland is a high pick that needs to be developed and delly is not the player he used to be. So i understand why garland-sexton-okoro is in the starting line up. But as others mentioned, sexton gets the blame even if garland has lower % and higher TOs, or okoro having low stat lines. I just dont get the hate with sexton and the want to bench him when he has shown the most production, improvement and competitive fire among the young players.