One problem with traveling he fails to address is the interruption to your career. What if leaving your job for a while means you miss
promotion opportunities? What if by the time you get back
someone else has picked up on your startup idea?
If interruption to your career is important to you, don't take a vacation at all. Spend all your time working so you'll get ahead and get promotion.
I used to worry about my career a lot and I ended up burning out easily. Traveling for me was a good way to take a break and get a new perspective on things.
I take a few months off to travel every 2-3 years and then I get re-energized and ready to get back to work.
Yes, when you travel, your career will be interrupted. But what is the trade off? For me, it was experiencing other cultures. Being in unfamiliar places took me out of my element and I believe has made me tougher. Adjusting to different social environments is not easy.