You do have a point. However, I don't get the impression OP is looking at it from a purely numerical/statistical perspective. In fact, I still think he came here looking for someone to tell him "DON'T delete the channel". If he proposed the idea of making scientific experimentation videos, I'd most likely tell him to start a new channel too. I just think "how to be successful" and "how to make money/handle finances" are close enough to appeal to similar audiences.
This is just my opinion, which is partially based on my own experience too. I've had a few brief stints in the "make money online" niche back in 2010-2012. I took a shot at "build an email list and then make money online by selling people products teaching them how to make money online" scheme. It worked for a while, but it just felt too dirty and sleazy doing that, so I ultimately stopped.
@TheWealthProject Good luck!