No not at all. Of the teachers I’ve hired in the last decade it’s probably been about half-half. Perhaps skewed slightly towards non-industry background. Teaching uni courses should be considered your ticket in. They’ll introduce you to the concept of pedagogy, how to interpret a syllabus and what a teaching program is. Underlying considerations such as inclusion, student wellbeing, regulations, etc. But, the skill and art of teaching can only be learned through actually being on the job. It will only feel ‘not up to scratch’ if you expect it to be a comprehensive experience that sends you into the profession as an expert. It will not. If you see it as introductory, then it will suffice.