One of my least favorite phrases is, “If it ain’t broke, don’t fix it”. This is a recipe for stagnation and decline. It implies you’re so uncomfortable with your understanding of the principles that govern the system in question, that you’re afraid you could never again achieve your current level of success if you made changes. It’s fear thinking at it’s worst.
There are only two states of being, improvement and decline. Choosing to avoid improvement curses you to decline. Stasis is a myth. The world is constantly changing and we must change to keep up.
Will you fail if you change your approach? Of course you will, and that’s ok. Reflect on the causes of your failure and try again. The only shameful mistake is the one you fail to learn from.
Will those who are too afraid to try ridicule you for your attempt? Almost certainly. They will tell themselves that yours is a cautionary tale, and will feel even more justified in their fear. Ignore them. It is better to have tried and failed than to never have tried at all.