I’d wager that 1. Banking stuff is hard to understand in the first place unlike illegal immigration or crime issues, 2. Many of the marginal Democrat voters he’s trying to attract are too stupid to understand something that complicated, 3. If he can’t build a wall and keep the economy from imploding stuff like this will rapidly become academic.
A lot of folks seem to act that way but time and again I come across the fact that Americans are smart and that finance is not nearly as mysterious as folks like to say it is. My take is that there's got to be some other reason.