Because presidents who flagrantly violate them - and use the office to get rich - might have zero trust left over to manage a no-transparency financial bail-out during a national crisis.
nymag.com/intelligencer/…
When one has blatantly disregarded the Emoluments Clauses to line his own pockets and those of his cronies.
The Presidential Emoluments Clause:
The President "shall not receive within that Period any other Emolument from the United States, or any of the [states].
Art. II, Section 1, Clause 7.
No federal dollars for Trump Org.
So just say so.