Because they can, as there is enough demand in Canada and US to warrant ~300$/day. Note, good instructors are usually booked months in advance and $300/day is still a rather low rate given instructor time investment.If like to know if there's a difference between how much of the daily rates the instructor "brings home" between Euorope and Americas. Could it be that the "insurance-package" in the Americas eats away at the profit? (Obviously taxes does the same, likely more in Europe than US).
My point is, would you as an Entrepreneur have to have higher rates in the Americas than Europe to have the same lifestyle?
I also don't think most of Europe's cace/tech divespots have too much tourist-impact on the prices compared to divespots in MX.
My CC/cave classes ran from ~8AM to ~5PM every day - that's about 9 hours, including "lunch and learn." Given that schedule, the instructor earned about $33/hour. If you consider the essential business costs in US (e.g., health insurance, liability insurance, etc.), that rate is somewhat low. Remember, an instructor is teaching you life-saving skills, not crochet.