I also see very innocuous reasons for selecting those dates: for instance if you want to show what happened "since COVID hit us" this is indeed the fully correct choice.

But irrespective of the dates chosen, even your carefully selected counter-data shows a 30% increase in wealth for the richest in about 2 1/2 years. Even those of us dabbling in stocks must find this increase mind-boggling, also as it continues a seemingly indefinite trend. The rich are getting richer, whether it's by 30% or 100% in 2 years it is damaging to our societies and means millions more continue to suffer as resources are used for private enrichment at a level that does not even bring these rich anything beyond vanity value.