You can't really compare taproot with segwit fork so I don't expect this would be the reason for any major price change, but I am not worried about that because we have our good old fiat printing machine for that purpose.
Taproot benefits are mostly related with scripts and multisig setups, and I doubt many people are using this options.
I believe you might be right. It’s not actually about the technical upgrade itself, or what improvements of each upgrade brought to the protocol. It’s about what argument “one upgrade” brought, and how it won against troll-narratives of the flat-Earthers.