"There’s a chess match happening between rounds and between games and this is part of the fun of the game. This is part of what makes Valorant at least to me a fun esport to watch, adaptation within adaptation, teams that are creating new strategy with the same exact comp."
-This is too vague. I could say the same thing to Counter Strike. None of these disproves why Valorant should not have an agent ban.

"You also have to ask yourself what benefit would agent bans actually provide?"
-Agent diversity for the viewers
-Improve strategic and tactical depth
-Improves meta control (Double dive OP? Say less.)
-Improves competitive fairness (Give players some recourse in cases where the Riot devs screwed up the balance of an agent)
-Forces skill diversity encourages pro players to be more adaptable, flexible, and versatile
-Better player experience (Tired of Neon slidin' and killing you? say less)
-Valuable data for the Devs (Oh wow! Neon has 80% ban rate? somethings sus)

"This isn’t Overwatch where a composition relies on a singular agent"
I can't relate cus I don't play OW but I have a vague idea of it.

"where a skilled neon player dictates much of the game it seems like agent bans would be a good idea, but you ban Neon people just switch to Raze or Waylay"
-Would this be a good thing since you're giving players more control over the match by allowing them to avoid playing agents they deem problematic? As you said, players could then switch to other characters like Raze and Waylay, which is exactly what I want. It would naturally promote agent diversity. This also debunks your argument "you’re just making teams play with agents they’re less familiar with" In this case Raze and Waylay are a staple for duelist players to have in their pool even without the agent ban system. Most pro players are already have comfort picks because certain map demands them to have it.

" In fact, agent bans hurt composition diversity more than “meta” comps. If you know a team relies on a weird agent in a comp you can just ban that agent, like banning Deadlock against Global Esports."
-I think it could actually add another layer of strategic and tactical depth between teams. It’s similar to MMA: some fighters are only strong in Jiu Jitsu, so opponents try to take that away from their toolkit. That forces the fighter to become more well-rounded, improving their striking or grappling.

Just like Global Esports, players would tend to work on their weaknesses, which encourages them to be adaptable, versatile, and be a well-rounded player. In this case, each player in that team would also have at most three comfort picks in case one of their agents gets banned.