If my home garage is packed with different tools, that still doesn’t mean that I can build a house. Heck, that doesn’t even mean that I can hang a TV on a wall properly.
Tools are just that “tools”. They provide means for the job. Even knowing when and how to use your tools is still not enough to complete a job. You also need a plan and the right mindset.
I believe this to be true for any endeavor in life. If your plan is sound, you properly use right tools and control your emotions, I don’t see why you should fail. But you must follow your plan. For most people that’s the hardest part.