Crewed Yacht Charters

When it comes to keyword selection, most people talk about the long tail phrases that supposedly generate an ungodly amounts of sales because they are so targeted. The argument goes, that if you only get one hit on a word, but it converts well, then that's all good. I completely disagree. Take a keyword like crewed yacht charters. If you target this word, then would you target Greek crewed yacht charters, or Australian yacht charters? No. Because no one searches for those long tailed keywords. No point in spending a bunch of money on those types of words if there is no traffic.