Do you genuinely not understand the idea of proof of work, or are you just attempting to conceal your actual point, which is that you don’t think the transactions in the Bitcoin network are very valuable?

You’re making it sound like you genuinely don’t understand proof of work. Proof of work is the reason that it is effectively impossible to fraudulently alter Bitcoin transactions. Again, it’s fine if you don’t care about that because you don’t see any value in those transactions, but surely you recognize the huge importance of preventing the modification of previous transactions in any sort of payment system.