> Banks by law require substantial PII in order to even do business with you.

That is technically true, but keep in mind that in the early days of banking banks expected you to provide that information without the hand of the law requiring it. The laws you speak of came into effect after the fact to normalize across the industry what the banks were already doing. History is repeating itself in tech, and we already know lawmakers are waiting with bated breath to do their thing all over again just as they did in banking once critical adoption is there.

I expect what you are trying to get at is that you are willing to trust a bank because giving them your life story was already normalized before you were born, so you have never thought to question it. Whereas tech doing the same now feels new and scary. However, that's a funny way to look at it as the kids born in the future, who never knew the world where you could use the internet anonymously, will see giving tech their ID as being no different than how you see giving your bank your ID.

Although I can understand why you would now question why any business that does little more than store numbers on a computer needs a comprehensive profile on you by law or otherwise. Normalized does not equal sensible. That is a fair point.