Security door with ordinary fly screens on windows

Hi All,
First time poster here.
My partner and I are building with Wisdom Homes (our first build).
At our Canvas Quarter appointments we were quoted for a security door on our sliding doors facing onto the alfresco.
However, we only have ordinary fly screens on the windows (some of which are quite large).

Is it silly to get a security door if we haven't secured the windows with security screens?
We intend on keeping all doors and windows closed during nights/when we're out of the house and to install an alarm system.

Thanks