Gaming is one of the largest, and fastest growing categories of video creation and consumption. Additionally, it's one of the most monetized with an estimated $160M in tips alone per year. Additionally, we're getting to a point where eSports are quickly skyrocketing in popularity along with the money surrounding them.
If YouTube loses gaming, it won't matter how the rest of the content is doing.
RE: YouTube is Dying and I've Got the Data to Prove It. | Q1 '18 Streaming Platform Report