Bitcoin IS a fungible token! NFT literally is "non-fungible token". Do you even know what you are talking about? Please go take a casual 5 minutes to google a topic you are unfamiliar with before spouting off about it.
Bitcoin is definitely not fully fungible, because you can easily trace its origins. And so you could "stain" certain bitcoins. "We don't accept bitcoins coming from transaction X"
NFTs and Bitcoin are both forms of tokens, which represent digital property rights.
The parent comment almost certainly understands this and was talking more broadly about forms of digital ownership. So your blasting them was kind of cringe.
Monero for example is fully fungible.