Because he shouldn’t be in the side. Paine could have bowled with his wicketkeeping gloves on and done a similar job to what Marsh did today.
Disagree. He played the fifth bowler role well, kept it tight, didn't let the batsmen have a free swing or get comfortable, and created a few chances. Paine couldn't have done that.
Now, I don't think it's enough to justify his selection over the other options, and I don't think he's yet proved that the extra bowler was necessary or gone beyond the bare minimum, but so far he has contributed more than Handscomb and has played the role.
Personally disagree with the media giving him credit for his economy rate though. Says more about how the bowling unit is working than it does about Marsh personally.