I wholeheartedly agree with everything @raino said in his reply above mine.
Especially:
Now for my additional 2 cents questioning the wisdom and/or motivation of some tutorials.
Without seeing a link to an article that says that, I assume it means having a hardware compressor hooked up between the mic and the audio interface.
If the website in question is by (or sponsored by) a hardware compressor manufacturer, then you might understand why they might be motivated to say that ![]()