People who offer themselves as negotiators between others. Finally, there are those who give advice as to how to solve a problem in such a way that others profit from solving it for the one who needs the solution. Engines can of course do many of the jobs on hand. A lot can be automatized. Most of the interactions will not take place at crowded places, probably.
Books are quiet.
Help is available. In this giant library of mankind, it suddenly turns out that far too few people are so far employed in the knowledge sector. The huge amount of work that is waiting to be done becomes only glimpsable now. Money is no concern at the moment since many people will love to work on this new reality which is almost like a second chance of mankind. But a few sedentary plants would soon be needed to preserve all that has already been contributed, to make it available in some preliminary filing system, so that improvements are possible.