I also considered creating a political debate forum.
I know that with the right content and marketing, you can grow those to be pretty big.
However, I hate talking politics. I hate getting into big debates with people. Why would I want to create a forum that will always be a political debate?
So, I decided to stay away from that niche.
I enjoy political talk but I am afraid to try this niche because people can get too personal when they are talking politics. In think instead of exclusive political debate, we can try adding all sorts of debates so that we can create a comparatively safer place.