Yes, one of many pieces pf guidance that needs an update.
I mostly agree with the comments, but as I've said in previous discussions, there are times I was grateful to have a good travel agent to make complicated arrangements, or get preferred connections and seat assignments. It cost me a fee for booking just flights, but it was helpful. I mostly book air myself, but would use a TA's help if it was available. But not because I expect them to have access to better fares than I can find on my own.
But I know there are a lot of people who are not frequent travelers, who are not familiar with booking their own tickets online, and more importantly, dont want to learn that new skill. How many times do we see posts here, from inexperienced travelers who don't know what codeshare means, or what openjaw/multicity ticketing, or the ins and outs of connecting airports. So there is a place for people who can help with this, and provide a lifeline for assistance.