i mean, seriously, you want javascript code to recompose a data structure, emit the new text format, hash it, and THEN also validate a signature?
the language barely even has a notion of byte arrays!
Discussion
ask nostr:npub1ye5ptcxfyyxl5vjvdjar2ua3f0hynkjzpx552mu5snj3qmx5pzjscpknpr about his tale of misery involving javascript secp256k1 schnorr (BIP-340) signature verification
it's heavy work
verifying the hash would be cheaper, and a deep compare over several relays would be faster
i don't hate web browsers and javascript for nothing
it's like writing software in 2010 for commodore 64
the reason why the usual json format of #nostr events includes the hash is so they are friendly to databases, that's it, and all
the actual client side verification of events is nasty... and interfacing performant hash and EC code to javascript is extremely clunky