If you have your personal tax residency in UAE, it might be worth setting up a holding company for your US dividend stocks in another jurisdiction (Estonia, Cyprus, etc.).
You can't lower the withholding tax rate that way, that would be illegal due to LoB clauses in the tax treaties. The US government isn't that stupid.
Sure you can do it and lie to them, then you've committed tax fraud in the US. Your call if you want to mess with the IRS.