For the negative side of the Internet, one only has to look at the Trench Coat Mafia and what happened at Columbine High School. Of course, this is one of the most flagrant examples of abuse of The freedom of speech one can imagine. On the other end of the continuum, there is the tendency for writers to get lazy on the Internet. Because of the accessibility, there are some writers who are not honing their craft because they can find a platform. I think writing is more craft than talent.
Writing is a skill one can refine and bring to a higher level.
They do not necessarily have to share all of this with the reader, but it will give the writer a handle on the character. In addition, I found that when you can capture the character's voice, you have won half the battle. This is found through the characters' speech patterns, their world view, their general outlook on life. Although you should start with the disruption in the character's life, tell the reader what bought the protagonist to the point they are today. Make your reader bond to your character.