You can not roll back the Bitcoin blockchain and if Bitcoin community do this, Bitcoin blockchain will no longer be considered as better than Ethereum blockchain or many shit coin blockchains.
Each mining pools, nodes can have their settings to exclude transactions from Ordinals but if they want to do it. Miners get benefit from more expensive transaction fee, higher fee rate because they confirm transactions and get transaction fees.
Reason to roll back the Bitcoin blockchain?
It does not make sense because a Bitcoin block includes many transactions and transactions for Ordinals, BRC20 tokens are one of many in a block.
We know that ordinals cannot be modified once they have been erased from the blockchain. Furthermore, destroying the transaction in bitcoin is too expensive.
Now, what you claim about us being unable to roll back the bitcoin blockchain is based on my knowledge, or technically, it is still feasible to do so; it's just too complicated and disruptive. This demands a great deal of collaboration from independent miners and nodes.
*Historical Rollback of Bitcoin