Verification level and Membership screening for community servers

Hi

I just wanted to say that when enabling community on a server, the server owner, admins and mods are required to set up a verification level for community servers and the option "None" is grayed out until you disable community, and I don't want to disable community because I've set up some things like the Welcome screen, rules channel and the moderator only channel which Discord staff tells the server staff about updates for community servers, but I've made my OWN verification system using Reaction roles in MEE6 so what's the importance of selecting a verification level, additionally, What's the importance of Membership screening when I already wrote my rules and added my own verify system to ensure that all new people agree to the rules and new members aren't invited self-bots? I've more than 16 rules on my server but on Membership screening you'll need to only have 16 rules, if you reach this limit you can't add additional rules, and Membership screening and the verification level on a Discord server to me they DON'T help protecting server from raids, but when you have your rules channel and your OWN made verify system you can have more than 16 rules and ensure that all new people agree to the rules and to help protect server from raid and compromise.

                                 Thank you for reading

                                  Sincerely

                                  Tech Technology.