Thankfully in Ireland you’re free to roam, dive, climb whatever, mostly. But there’s always control freaks and rule makers who hate to see a free thinker and doer. It makes them uncomfortable. As for searching for you in the case of an accident, Not once in 50 years of been involved in search and rescue on land and water, have I heard the motive of the victim been questioned. S&R is voluntary, people are free to take part or stay at home. As for the OP if they know the person they’re dealing with and confident in their skills, I wouldn’t think twice about it.