There is no doubt that sideloading by uninformed users can be used as a backdoor.

It's also not a surprise that banks/industry that's accountable to recover the losses for tricked customers is looking to someone else to solve it for them.

However, if this was "piloted", do we have the numbers of how much has it decreased the number of scams or their impact?

I wouldn't go as far as to say that it is impossible to "educate the public", but it is indeed extremely hard. But click-through pop-ups have succeeded when?