Does it mean that I have to learn how to use yet another pulse survey software?

No at all! SC Pulse is not like any other software. It is a solution to help you manage your current software in a more intuitive way. You can think of it as a personal assistant willing to do all the tedious Power BI and pulse survey generation tasks for you while you only have to write down a few commands. 

The magic of SC Pulse is that it works on top of MS Teams, therefore making it more usable and likeable.