Firstly, yes that text is a templated response available from the review queue. It is worded the same way on all the sites that I can see.

I have seen quite often on sites like SuperUser that new users will post an answer along the lines of "Have you tried...?". This is clearly something that should be in a comment. In these cases the template response is appropriate and guides users to the help centre.

The reputation threshold for comments has been discussed here. It tries to teach new users the difference between a comment and an answer on the SE system.

It is true that the Not An Answer close reason is sometimes used too enthusiastically. It is also true that the wording may be confusing to a new user.

The template texts do get changed from time to time. Perhaps you could suggest an improvement. Meta.SE may be a better place to do that.

Firstly, yes that text is a templated response available from the review queue. It is worded the same way on all the sites that I can see.

I have seen quite often on sites like SuperUser that new users will post an answer along the lines of "Have you tried...?". This is clearly something that should be in a comment. In these cases the template response is appropriate and guides users to the help centre.

The reputation threshold for comments has been discussed here. It tries to teach new users the difference between a comment and an answer on the SE system.

It is true that the Not An Answer close reason is sometimes used too enthusiastically. It is also true that the wording may be confusing to a new user.

The template texts do get changed from time to time. Perhaps you could suggest an improvement. Meta.SE may be a better place to do that.