Doesn’t matter. If math allows for the possibility, and the math is 1) logically consistent and 2) doesn’t violate first principles, it does seem to happen in nature. Black hole radiation is another example, gravity waves and virtual particles annihilating one another with real particle production are others.
There is now empirical evidence, including gravity waves (have been detected) for all you mention, & they are still not string theory, which is imaginary. And, IT is only “logical” because it imagines factors to begin with.