There weren't as many techniques as skills as techniques had limited applications and could merely enhance the user's body, while skills had infinite possibilities and applications.
However that made it easier for Adam to make his decision and techniques were also cheaper than skills in the system, but they also required him to spend a lot of system points on mastery if he wanted it to actually be of much use to him.
If a cultivator were to hear about how Adam could browse a game-like store and purchase techniques then instantly increase his mastery over them with the press of a button, they would all die of jealousy.
Cultivators could spend weeks, months and even years training a single technique to gain basic mastery over it, but yet Adam could do within an instant.