Yes, the guidelines for safe amount of units per week are basically arbitrary and not based on anything scientific, and vary a lot by country. [1]

For example, where I am from, Canada, the Canada Low Risk Alcohol Drinking Guidelines state that men should limit their intake to 15 drinks per week, where a drink is defined as 12 oz of 5% beer, 5 oz of 12% wine, or 1.5 oz of 40% spirit.

OP would hardly be exceeding the guidelines if he was from Canada, and not exceeding the guidelines if he was from Fiji.

This is why merely looking at the guidelines is dumb instead of the many other visible factors (personal relationships, weight, athletic performance, academics, etc.)

[1] https://health.spectator.co.uk/the-great-alcohol-cover-up-ho...

[2] http://www.ccsa.ca/Resource%20Library/2012-Canada-Low-Risk-A...