Because in the minds of those floating voters, you know the ones who actually make the difference, Pelosi and co looked spiteful. Not professional, just spiteful. Obviously with you not being a floater and with a predetermined outcome you will not see it that way. But for those in the USA who are patriotic, and most are, they will see a spiteful woman, ripping up the Presidents address and wasting the time of the senate. If you don’t see it fine, just wait until November when he gets back in....I‘ve no axe to grind in this, I’m just seeing it from afar as the eyes of the floating voters.....
Pete, we know he's getting back in, literally nobody is denying it. Pelosi ripping up a sheet of paper hasn't affected that any more than Trump's stupidity and criminal behaviour has affected his chances at reelection.