Great question indeed.
For me, finding the right path is what it's all about. If you're following a proven blueprint, learning every single day and taking action, then you'll eventually hit your goals.
If you're following a method that's NOT been proven "e.g. forex" and you just keep going at it, you might be very disappointed at the end of your journey or maybe even worse.
Do your research and follow a path where you can see a lot of people already achieving what you're looking to achieve down the road, I kind of feel it's a universal law. if you can't find a healthy amount of success stories, then that's a red flag and you should probably stay away.
I know someone close to me who's been in the forex industry for about 15 years and the "not giving up" mentality has basically ruined his life because forex is NOT a proven system.
For example, with a bit of research, you'll find out that most people "gurus" claiming to be making money day trading are making it through selling signals and courses and not necessarily through what they preach.
So the answer to your question really is, it depends.