>

There is no “10,000 hours” rule. That’s a line from a Malcom Gladwell book to very poorly articulate a simple concept that it takes time to become proficient in something. Gladwell is a pseudo science author. 
For some things, it takes far less time to become proficient, and for others, 10,000 hours is nothing. If you enjoy baking bread, you will probably be very good at baking bread well before you hit 10,000 hours. If you’re ever in the unfortunate position of being on death row, you will want an attorney with much more than 10,000 hours of experience.
It makes you more knowledgeable than the layperson. But also, "the blind leading the blind" is a phrase for a reason >

People need to be their own advocate for their health including mental health. >

They want to be in relation to their own revolution of experience as it relates to their diagnosis. 
But yeah, sometimes some variations of mental illness will inhibit the awareness and ability to be rational and self-aware about that particular condition, etc.
While the experience can be valid for those who have improved and have found mechanisms to make their condition better, and that experience can be possibly worth sharing, other times it can be like the blind leading the blind and sometimes even worse, making others with mental illness amplify the symptoms of their illness. Kinda like politics! >

Come to the bipolar subreddits, there are so many posts from people who don’t even understand their own condition, let alone mental illnesses in general. Even worse when people try to diagnose themselves. >

It's awful. I see so much misinformation in bipolar spaces. The most common are 1) that any impulsive decision or self-destructive decision is automatically mania or hypomania i.e. I dyed my hair green, I'm sooooo manic 2) that "cycling" from happy to sad, or whatever combination, during the span of a single day is bipolar disorder. People with bipolar disorder do not cycle daily but that shit is everywhere. >

Between that and the new "sElF-DiaGnoSeD" bullshit, you have a recipe for disaster. Looking at you TikTok. 
Oh wait, isn't that what zoomers overwhelmingly use? And what? They have rampant mental health issues? 
Imagine my shock. >

Ban TikTok! >

Social media is the mental illness self diagnosis and treatment super center tho? >

It doesn't. But, gained experience over years and through therapy from professionals can give greater knowledge about the subject. Especially therapy, because therapy is about gaining knowledge and understanding of, and how to manage said illness.
The general rule to become an "expert" is the 10,000 hour rule. (three years) depending on the subject. So it is arguable if someone has lived with an illness for five or even ten years, they have gained an extensive amount of knowledge on said illness.
That being said it doesn't qualify them to give advice or treat others on that illness and to do so could be wreckless.
Edit; spelling