In this case, I expect it's going to be blowing those ratchet straps after they become unanchored, turning them into whips that'll cleave the roof in half.
Look man I'm not a sciencologist but if a big ol tree smacks into that strap maybe the strap doesn't break but the metal tie downs? Idk man doesn't seem like it would work out well for the house or straps
A 2" wide straps is supposed to fail at about 10,000 pounds/4500kg of static load. The nylon strap will fail long before the metal hardware does, and the roof is going to fail before either of those do. If a large enough object fell on the strap, the most probable scenario is that the strap would end up acting like a wire cutter to the roof.
Hurricanes rip poorly built roofs off all the time. Builders get lazy and install the hurricane anchor things wrong. At least the local home inspector on Reddit used to say
That particular redditor had a long history of weekly posts with the shitty home builder work they inspected, but I hear the argument, I have no evidence other than hearsay and didn't research it myself.