Hopping banks is easy for just savings, but a lot of work and inconvenience for your standard payment accounts, and that's ignoring additional services like mortgages and insurance.
The solution is not voting with your wallet, but either leveraging the DMA or drafting new laws that counter this.
Either Google should be forced to approve secure alternatives like GrapheneOS or companies should be required to also implement AOSP attestation. Or alternatively, remote attestation should be banned completely, but I can understand the argument that it serves some legitimate uses.
Vote with your vote for politicians for common sense regulations that favor the consumer at the expense of everything else.
[1]: https://www.acm.nl/en/publications/acm-savings-rates-lag-beh...
0: https://www.rabobank.nl/particulieren/beleggen/rabo-beheerd-...
It is also just very hard in practice. A lot of people have their mortgages, savings that are locked for years, etc. at a bank. Also, switching a bank also impacts other family members if you have shared accounts, etc.
In this particular case it's also not fully clear yet whether Wero is starting to enforce this. If that happens to be the case, it's only a matter of time before other banks also start requiring Play Integrity for Wero transactions.
That's not good enough, you also need to convince regular people to do the same. Your vote alone will not achieve anything.