In a spam attack when someone is pushing garbage into the blockchain (as it is a "freedom protocol") the fee market kicks in and increases the cost for them.
The Bitcoin blockchain doesn't recognize incentives and types of spam attacks in this matter. Nor do humans know with 100% certainty. There is spam, and whether it is used to fulfill the owners of some shitcoin or not, the same damage is done. If the Bitcoin network allows for all types of transactions, then idiots who push their shitcoins are also welcomed to broadcast their transactions.
When there is incentive (meaning a useless token with actual price that they can sell for real money to cover the cost of the spam attack) then the fee market is only harming the real regular uses trying to send bitcoin around since the attacker is earning money to spam the network.
But, that's bitcoin. Regular users should acknowledge this first, and move on. The network's state isn't dictated by anyone. If someone can tolerate the premium fee, he's welcomed to float the chain with NFTs. We endorse censorship resistance.
Besides, there is a nearly infinite number of manners to create altcoins using the Bitcoin blockchain. You can't prevent them all.