The fundamental lie here is allowing banks to tell you you have “cash” deposited and “available” with them. If the online app showed the truth - how your $10k you deposited turned into some shares in mortgage backed securities or whatnot, the alternative “just pay to park some cash” might be able to survive.
I have the same pet peeve about Amazon being able to tell you that you “buy” a Kindle book instead of buying a revocable license to read it temporarily.
It’s all false advertising really and it’s eroding competition and consumer trust.