There is a close message that does already contain much of that information, so it seems like a bit of a redundancy. We have the ability to edit the generic off topic message, plus define up to three of our own custom off topic close reasons. Currently the generic message reads as follows:
This question does not appear to be about network engineering within the scope defined in the help center.
Second, I personally prefer to be less canned when possible. I have dusted off a piece of software I hadn't used in a while that allows me to post my comments in a more personalized way.
At present I have just over 30 "fragments" of comments I can quickly string together, with or without additional specific input from me, to provide a more tailored response. Hopefully this helps to provide a more individualized experience, especially to new users.
For example, the most common generic combination I have been using is for home/consumer questions which takes the form of two or three fragments. I first check the user profile to see if this appears to be their first contribution. If so, I start with the welcome message:
Welcome to NE, we hope you will both contribute to and learn from this community.
Followed by my close reason:
Unfortunately, NE is a site for network professionals to ask and provide answers about professional networks. Questions about home networks and consumer devices are considered off topic by this community. Please see What topics can I ask about here? for more details.
And finally a pointer to where their question may be a better fit:
You could try posting this on a different site on the network, such as Super User.
Naturally, this is a work in progress so it will likely change over time.