How is it nonsense?
The EU law is that the reject all should be exactly as easy as the accept all button. 1 extra click, however minor of an inconvenience it is, is extra effort. And therefore strictly speaking in violation of the law.
Nothing will ever happen but it's valid criticism.
Don't get your hopes up. Apparently the latest RoR2 expansion was made by the new Gearbox crew and that didn't work out so well...