I don't have a technical stack because I don't consider myself an expert in those things; I just know how to use them. I still feel ignorant. If I can do it, you definitely can too.
The vast majority of programmers write awful code. No matter how intimidating the job description looks, trust me: most people are just a bunch of amateurs pretending to have it together.
The vast majority of programmers merely memorize the underlying mechanics of even simple frameworks rather than implementing them from scratch—let alone writing the code on the spot during an interview. You must accept the reality that most people are low-level programmers.