They all have a point onto why a screen door is necessary a needed item for their home. If you live in a bug infested place, it is wise to get one. If you live in the ghetto, you can have one too. Now get this, the rich place also can get a security bar door as well but hear me out.
If you want to rob someone, do you want to rob the rich or the poor? If you rob the poor from the ghetto, enjoy your 72 inch box tv. I'm heading to the rich area of town where they give out big chocolate bars candy and this is the reason why some rich neighborhood houses do have these bars on their windows.
Also, in the west like arizona where mexican is the next state over, it can be a style statement. Take a look at this here for references.
But still, as a home owner, do you want to increase the valuation of your home? IF yes then why put bars on your door for? It is like you are living in a prison type of an environment.
but still though, what about your safety? It is called a security door for a reason.
but still though..... see where I am going with this?
IT STILL DEPENDS....