If that model results in wormholes randomly opening up here and there, it doesn’t necessarily mean it’s going to violate our current observations. What if the probability of a wormhole event is incredibly unlikely. You know, like a tennis ball tunneling through a solid wall sort of unlikely. Even if the probability is a lot higher, those wormholes could open up anywhere in the universe, which just so happens to be incredibly vast. Or what if the wormholes are absolutely tiny, and last only a nanosecond? There are lots of ways it could still be compatible with observations.