Also, to avoid "dangerous" not yet professional amateurs having a chance against big editors.
Courts and regulators, particularily European ones, understand when there's a "will" to follow the law. It's one of the differences between "rules-based" and "principles-based" regulations.
- If you run a commercial kitchen on your own (or, let's say, with a staff of 2-3 people), can you ignore the food safety regulations? The fire regulations?
- If you run a one-man plumbing company, can you ignore safety regulations? Water regulations? Sewage regulations?
etc.
Why is it than when it comes to "commercial software" it is inevitably "oh my god these laws are so hard, why should I as one-man company be forced to comply with them". Because that is literally your job.