If you have something else lined up and just want everyone to wave you goodbye then so be it. But people obviously want to help you and it sounds like you're looking for some.
I'll just say it's better to be mediocre at something than to do nothing. A non-FAANG job/tech endeavor will still expose you to a lot of opportunities. You may not immediately be making what you want to make, but over 10 years there's a non-zero chance you'll luck into something bigger. A 20% chance of getting what you want is still better than a 0% chance. In the process you may find something you are actually exceptionally good at. It's much harder to find these things if you're not actively working on something.