Says it all right there. An unarmed president, protected by armed Secret Service Agents on lawful duty, present no reasonable threat of vilonce to the officers or any other person conducting this search.
There was no reasonable expectation that the officer were in any danger whatsoever. None. Zero. Zip. Nada.
And then there is the little problem of threatening force against a former President being a felony under which Garland and his henchmen need to be rounded up and thrown in jail.