What you need to realize: every argument you made is universally applicable no matter what size the field is. No matter what size the field, as it goes on the better teams advance and one team doesn't lose any games. There is no argument against that, because it's a fact. Your argument is you want to watch 16 more games. Mine is I like it how it is.
No, the argument I'm making for expansion would not work if the tournament actually included the top 64 teams, or top 32 teams, or top 16 teams. The current tournament does not include the top 64 teams. It includes the top 40-45 teams and 20 or so teams that don't even sniff the top 100.
You've got it made up in your mind that by adding 32 teams we'll all of the sudden have better games across the board. I disagree b/c I think you're adding 32 more teams that don't really belong either way, and don't mind that the 1 and 2 seeds get a pass in the 1st round. The chance of having a handful of slightly better teams in the round of 64 isn't worth the price of losing the "magic" of the first round from my point of view.
You already have 32 teams that have no business being in the tournament. But they're okay because of "magic"? Fantastic argument, sugar dick.
Everything you're saying is completely subjective.
By moving this invisible bar from 64 from 96 you've done nothing but move the same discussion to a different pool of teams. It's just a pool of teams nobody cares about, basically the NIT field of 32.
I do love your idea of a "coherent" argument though:
Sugar Dick: adding 32 teams that didn't belong before doesn't make the tournament higher quality
Michigan Cat: yes it does, after 32 teams lose the field of 64 will be better
SD: you realize the tournament still has 96 teams to start with
MC: I would like watching those games
SD: watch the NIT
MC: you agree with me
SD: WTF?
MC: by winning games better teams move along
SD: I know how a tournament works
MC: you're argument is incoherent. I'm right! There are 45 teams that belong, we need to favor 32 of them, and make the other 13 play in a pool of 64, that way we we get our 45 best teams, and only have 19 that don't belong. This is materially different than what we already have, because there's a chance some of the schools I didn't like watching won't be there.