Why do people tell people who are introverted to talk more, but dont tell overly loud people to quiet down?

Like why do people who talk alot tell an introvert to talk more, i just value inner peace and not interested to talk, like ill discuss stuff but if i dont initiate im not gonna talk to you, and i get super annoyed when people keep pressing on about it, like i just prefer my own thoughts, and i cant think while i talk, so i take like a minute for an answer , but in general why arent loud people told to settle down a tad?