The amount of people who care about the open vs closed-source dilemma outside of this forum and similar online gatherings is surely not that big. Some people I have traded face-to-face with use Binance exchange as a wallet and Trust Wallet. There is nothing I can do to change their mind. Only a negative experience can make them approach this differently. If we agree that the average Joe won't bother using an open-source wallet, when all the ads and Google searches point them towards a closed-sourced one, I don't see them doing any research about who the original creators of the code were. A very small number of people will care about that information.