Even when fundamentals are very good, market sell-offs can still happen.

This is purely technical, the result of Wall Street bears meeting in the morning. They can do it, and have done it many times in history.
They can crash a perfectly good situation so badly that even our own mothers wouldn't recognize it.
With such a great opportunity, if I were them, I would do it too. I would even go all in short. But I don't, because:
1) I am a long-term investor.
2) I don't have insider information from institutions, so I don't know when to enter, especially when to exit.