They would if it applied to them and they had to do work to comply. This is very simple. If a law applies to a company, companies will worry about it and the perceived risks. If a law doesn't apply to a company, they won't worry. Ideally, both the laws and their punishments are as narrowly scoped as possible to prevent abuse at the whims of enforcer subjectivity. It goes without saying that a business not affected by a law won't sweat it like they might if affected by a law. Couple that with ambiguities in the legislation and effort to comply and it's clear why small businesses sweat one and not the other. It's a very poor comparison.