Let me try to explain what has happened here:
- Someone calculated the size of Earth's Null incorrectly, leading to a size that seems to be about 7x what it actually would be. Angsizing is an imperfect science.
- Kirua was extrapolating from the fact that this Null formed in 0.2 seconds, that the Null that destroyed Proxima Centauri would form in about 1 second, based on the size difference of the places.
- To determine this, Kirua got the size of Proxima Centauri, and misunderstood it as the size of the system of Proxima Centauri; instead, they are using the size of the star itself.
So not only would this not be a 4-B feat, but it isn't even a 4-C feat, as the star is leagues smaller than our own sun (which is the baseline for 4-C). I don't really believe the timeframe thing much either way.
All of that said. You are free to believe what you like! VS Battles is a site that does its best with the information given. If you internally believe they are black holes and should be treated as such, it is your given right to do so. But in terms of our policies, the evidence is weaker than necessary to grant these calculations validity.
Please, guys, you need to try to understand what I'm saying. The communications breakdowns are impossible to deal with.
Obviously you didn't make up the size. I replied to the very calc you linked! But I am saying that it is obviously wrong. I, too, am a Calc Group Member, and it doesn't require a CGM to see that the numbers don't line up at all.
With that out of the way. The Proxima Centauri feat does not seem especially relevant to the current discussion. Does that leave us, then, with the destruction of Earth calc at 5-B?