Good question. I agree that the with the information given, it seems like one should scrub the dive. However, what is the size of the boat we are using and how many crew are onboard? If it is just the Captain and one crew member, I am not doing the dive for sure. However, if the boat was a bit bigger and there were more crew members that could be spotters, then myself and my dive buddy would have a conversation. Also, what size is this buoy the guide has? Is it an SMB and if so, is it over 3 meters? The waves are 2.5 meters so it would need to be larger to be effective as I feel the biggest risk here is the fast currents.
Along that line, do myself and my buddy have the proper SMBs to be effective as each diver would need it in case of separation due to the currents.
As you can see, there are many factors left out that could determine if you make this world famous dive that you have traveled abroad to do and clearly spent a lot of money on. Is my life or that of my buddy worth it, if course not but with proper experience, the conditions one sees as being acceptable changes when on a big trip. This is of course assuming , which I hate to do, that everyone involved is prepared.
This same scenario asks what my buddy and I would do. Does this assume the boat Captain and crew, guide included, has said it is ok to dive? I have to assume they have since that information is not available.
The more I look at the question, the more I see required to make the most informed decision.