Why does SailsJS need a task manager?

Question

Node.js

In my free time, for a few hours in the evening, I study SailsJS and got to the point that I can’t understand why he needs a task manager.
I will explain the reason for this question - I use Gulp as a task manager (instead of Grunt, which comes by default), which I know, if not by five plus, then by four for sure.
And since I'm alone, I want to customize everything to my liking. But there is something in the gulpfile itself that I don’t understand
(the author even wrote that if you don’t know what you are dealing with, then don’t touch it) which I hope to understand by understanding the meaning of the manager’s taxes.
What is its purpose? Does it only perform simple assembly, or are there some tasks buried in its bowels without which it cannot work, but I cannot find them?