One man's flaw is another's feature. Life is too short to strict typing
Because the product would never have been released given the same constraints on developer time x count x qualifications
Maybe for the good of us all, maybe in that case they SHOULD have used Java ;)
I was going to address the "why" by explaining actually why (Refactoring time required, impact difference, other negative tradeoffs, active devs on the projects / hiring requirements, benefit to the global python community, ...).
But it looks like this is a troll account, so flag & move on.