another question about Stealth Ports Wizard

i found it is written in the help file of cis about Stealth Ports Wizard :
Block all incoming connections - stealth my ports to everyone

Selecting this option means your computer’s ports are invisible to all networks, irrespective of whether you trust them or not. The average home user (using a single computer that is not part of a home LAN) will find this option the most convenient and secure. You will not be alerted when the incoming connection is blocked, but the rule will add an entry in the firewall event log file. Specifically, this option will add the following rule in the ‘Global Rules’ interface:
Block And Log | IP | In | From Any IP Address | To Any IP Address | Where Protocol is Any

it says that “the average home user (using a single computer that is not part of a home LAN) will find this option the most convenient and secure”,is that also imply i 'd better not to choose this option(Block all incoming connections - stealth my ports to everyone) in Stealth Ports Wizard if i were using a computer which is a part of a home lan?if so ,why?