In the 80's and 90's, this is how most people booked their holidays. It was labour intensive, people would spend some time talking with a travel agent in a store, who would have a good idea of the packages available, and be able to make recommendations and match people with holidays.
The remnants of agencies still provide the same services, but (for the most of us) it's all online, it's all tick-box based, and much of the protection is via ATOL/ABTA.
These services still exist, but they're no longer all over the high-street. Names like Thomas Cook, Lunn Poly, have either been absorbed (mostly by TUI), or collapsed, and largely disappeared from the high-street with just a few left. (Mostly Tui).
And those that are left, have been reduced, much like retail banking, to entering your details into the same websites and services available to anyone, and talking you through the results that the computer spits out, that you could have browsed yourself at home. The underpaid travel agent in the store isn't any better connected than you are. In fact, they're possibly even more pushy about pushing you toward the hotels with the best commission than the website is.