Parse JSON - when to parse variables?

Sometimes you need to use a Set Multiple Variables module followed by a Parse JSON module:

But other times you use a Set Multiple Variables module without having to Parse any JSON:

What gives?! How do you know when to use a Parse JSON module or not when Setting Variables?

Set Multiple Variables + Parse JSON:

• This is for when you have a big JSON blob that you’re pulling and you want ot parse it into usable variables for downstream modules.

Set Multiple Variables (No Parse JSON):

• This is for when you already have clean/usable values from previous modules - you don’t need to parse or transform the JSON, you just want to assign & re-use them.