I think it's just like anything else where you're working with a Professional to add value to do something that you could theoretically do yourself.
But, just like anything else, it kind of depends whether you're an enthusiast or not. And whether you know what you want to do or not.
Doing it myselfExample, last year, I took my "vacation of a lifetime" to my hometown in Saudi Arabia. I booked everything myself because:
1 - I was redeeming a ton of Qantas points to fly First Class on Emirates
2 - I knew exactly where I wanted to go and exactly what I wanted to do. Which in my case was nothing touristy. Because I was going to my hometown after 40 years away.
I didn't need a tour guide or any recommendations. I already knew exactly:
- The hotel where I was going to stay
- Where I was going to rent a car, where I was going to Uber
- And of course the flights booked on my points
I am a travel enthusiast so, for me, I'm willing to do things that others wouldn't in order to get the flights that I want. Like a 12 hour layover during the day in Frankfurt for instance.
For work, we have to book through a travel agent.What's nice about that is that the travel agent has some sort of magical ways to rebook flights and hotels and deal with cancellations.
Also, working with the travel agent, we can specify the airlines, or the travel parameters - i.e. no layover longer than 4 hours, Premium Economy on International flights over 4 hours, normal size rental cars, King Size Bed, etc.
I can say that there have been several times on work trips with last minute cancellations and changes where I've leveraged the travel agent to do things that would have cost me a significant amount out of my pocket if I had to do them myself.
One of my best examples is a flight from Houston Hobby to Tampa that was delayed several hours and then cancelled around 11 pm.
Our corporate travel agent was able to rebook me on the 5:30 am flight, cancel the hotel and change the rental car and I never saw a bill for any of that.
Also, during my 6 1/2 hours between cancellation and new flight, I would have had to do the legwork to make that happen. Not to mention that Marriott definitely would have charged me for the no show at the hotel.
Some things you'll have to use a Travel Agent
I've been to all 50 States and 6 Continents so my last major goal remaining is Antarctica. For a trip like that, I'm going to need help so I'll have to use a travel agent since you can't just book your own flight to Antarctica.
Also, if you don't know anything about the area you're going to, a Travel Agent can offer great tour suggestions. As an example, my family when I was a kid, used a Travel Agent to visit Athens, the Greek Isles and Egypt including a side trip to Luxor and the Valley of the Kings. Rome and Paris were more obvious so for those, we just found our way around on our own.