I think you might be confusing what the issue is.

As we see in this case, the (likely) person in this case was actually found from the relatively small number of people who fit this criteria, so police were (likely) right to suspect these people.

The issue is not who the police may or may not suspect. it is about reasonable expectation of privacy. If they had obtained this exact same list of people who were near that bank for that time by a means that did not violate their reasonable expectation of privacy, then the evidence couldn't be challenged on that basis.

>A one hour period and 150 meter radius of a bank surrounded by high-rises and public transit? no.

Two weeks of no leads and that no is gonna start looking an awful lot like a yes.