It has been my observation that Will's videos often omit or gloss over details including safety considerations, including ocp, grounding, etc.
I think this is probably for the sake of simplicity / avoiding complexity, or possibly discomfort with giving advice on safety issues for legal or other reasons.
For this reason, I think that other than for small and simple systems, Will's examples are best considered learning tools and simplified starting points (he is a great explainer, and great at simplifying semi-complex ideas and systems), which should be adapted to your needs and improved upon, particularly with regards to safety and in some cases component quality.