There are many different kinds of interaction in an information environment like web pages.
Clicking and scrolling are just two of them. And both have different mental models when accessing information.
One limitation of any information environment is that there’s only a limited number of information that can be displayed all at once, at the same time. Besides, a user could focus only on a limited number of information at once.
Clicking and scrolling could be combined, though, to optimize the interaction—meaning, the easier for the user to perceive and get to the information, the better.