Ok this sucks, but there is something that seems to be not implied. Wait one day, then confirm with biometrics, then decide if you want this only this time, or 1 week, or forever. You have to only deal with this one time if you choose forever (as long as you don't reinstall, I assume).
This is by no means ideal, but I think I'm ok with this. In a way I believe the rhetoric they are framing, to protect the vulnerable populace (e.g. the elderly) from frauds. For your phone, you can get the hurdle over one time, if you are installing for your parent you can do "don't ask me for a week, or ask me again everytime", so they don't install something malicious as part of a guided "tech support". Not saying that will prevent all and any spams but it will add some barrier. Just my opinion though, I could be off base with this.
I do wish that 1 day waiting was a bit shorter.
