> i don't understand this people

Why don't you keep it that way? Words are very inaccurate. Peoples impression are what they are, what they experience when listening to something. Not to be mistaken for the properties of the object listening to.

You might start your journey to insight here: https://www.stereophile.com/writer/15081

More recent: https://www.audiosciencereview.com/forum/index.php?pages/Reviews/

Indeed, educate yourself but if you do, select the right teachers 😀