That is an argument against it. If they already solved the problem with mobile payments adding blockchain to the mix doesnt add any value.
Many people appreciate payments the state cannot arbitrarily censor. Blockchains are good at this.
"many" people in your argument is more likely a "minority"
Most people care about the rule of law, payment systems that subvert this possibility are not desired by "many" people
It’s like asking “any good way to avoid paying taxes?” You’ll definitely get lots of opinions, but you should also be cautious about taking the advice.