Amazon is welcome to fork and welcome to point out that they might be better for users than Elastic. But the issue here is that Amazon--like many others before them--are asserting a 'right' that simply does not exist.
I don't think Amazon's trying to claim that Elastic has done something legally or morally wrong. They just don't feel Elastic has lived up to their standards for community management, so they're going to take their ball and go start a new community with higher standards.
