When people say that, in practice it usually means they only want to hear from people who agree with them. That’s usually what happens, too, which is why they rarely learn anything.
This thread is what might actually help you, but only if you read it, think about it, discuss it with traders who are making a living, and ask yourself whether it’s either possible or sensible to try to create artificially, simply by position-size adjustment, an edge for a method that doesn’t actually have one on its own, without doing that.
When you ask the right questions, the answers become much easier.