Because the internet is a world of extremes, success and failures could literally happen overnight. The speed by which you can have web pages listed on first pages of Google could bring immediate and substantial amount of money to your business, literally overnight.
The same speed however that leads to this immediate success could cause complete devastation to business owners and to individuals who find that their reputation has been tarnished almost overnight.
The fact that almost everything on the internet is changeable and movable should be somewhat comforting to victims of online defamation, online reputation attacks and online harassment.
Having the knowledge that nothing on the internet is set in stone gives people a real hope that their reputational issues could one day be resolved.