...but don't listen to anyone who doesn't consistently make you money.

The problem is that there is no such person. There is no such thing as consistently making money, as every career of advice or investing will have some hits and misses. Mr Buffett, GOAT, is not immune. So, your rule could be rephrased as "don't listen to anyone". That probably isn't the optimal route to wisdom or wealth.

I have sometimes used expensive economics advice to inform my investing. They were wrong frequently. The losses were small, and the gains were truly spectacular, so the advice was certainly worth the cost.

I find there are many models and sources of information which provide an outlook on economics and markets, which are not reliably correct, but are far far better than a coin toss. The art is not to avoid such things, but to find ways to use them in such a way that you benefit when they're right and don't lose materially when they're wrong. Most people don't have a very good feeling for things that are neither random nor predictable, but in that grey zone between, which is often the most interesting section of the world.
xkcd.com: xkcd: Prediction

Jim