The question is not 'can traders make a consistent profit' but rather 'can anyone make a profit using just publicly accessible historical data alone' this is the essence of EMH.

Most professional money managers make their gains by actively interviewing companies in a form a stylized intentional financial journalism if you will.

Now you just need to point to some traders who are able to make "consistent significant profits".

And not just "some" but a proportion of profitable traders greater than what we would expect due to chance - i.e. the existence of some lottery winners does not prove that playing the lottery is in general profitable.