I emphatically disagree. If your job has high stress, then relaxing and checking out can pay huge dividends; up to and including the ability to maintain your high stress job. Additionally, for those of us who take more exploration-learning-bucket-list style vacations, the memories and knowledge offer more value the earlier in life you take them, as they contribute to lifelong education. Finally, the vacations provide networking opportunities, opening doors due to shared experiences leading to new friendships and possibly new jobs or clients.