Depends where you're applying, right? If you don't know what hyper-parameters, regularization, or cross-validation are and how they affect your work, then some jobs just won't make sense until you're able to talk about those coherently.

The skills you have are useful. I know we wouldn't hire you in for a data science role on my team. I could imagine many other places they're useful, though, so perhaps it's the places you're searching.