The core of your question is really “Why do people suggest therapy when I want to talk about my negative emotions?”

Because working through a damaged psyche isn’t something your friends and family are qualified to do, and they’re likely going to make it worse or damage their relationship with you if they try.

But I get why you’re asking - you reach out during a dark time looking for support and community amongst those you know, and they use “you should talk to a therapist” to dismiss the conversation, which really doesn’t solve anything and ends up making you feel worse by suggesting that only a professional you pay would want to listen to you.