809300 deaths out of 51574787 cases is 1.5%. that's nothing if you don't care about the people that died, or the many that suffered and lived.

How many deaths does it take be considered deadly?

Based on the survival rate of 99.8% in 7B (approx world's population) is about 14M deaths (if we are not there yet, we should be tending towards it based on the survival rate). Besides, this doesn't consider cases of long covid, financial and other impact on people/families etc.