It’s important to keep in mind that pretty much all the techniques you’re too „stupid“ for all aren’t necessities for small projects, but rather being able to manage complexity (or workload) at scale. For an MVP or a small product, keeping with the simpler techniques is absolutely fine, and adhering to those standards in many cases can even be considered overengineering.

Though there’s one thing I take issue with. „I’m too stupid“ implies that these techniques are impossible to understand, while I think it’s just a matter of being able to put in the time and effort to learn the intricacies. It’s absolutely fine if the resources (mainly time) aren’t available to you, but I don’t think it’s a matter of cognitive function.