[2021] The Folland Gnat F.1 / HAL Ajeet Mk.1: Should it be Implemented?

It does matter indeed, and SRAAM was intended for GR.1 too. Thats why it has them also. They are not "fantasy" but a fully proposed and intended option, but one which we have many examples of such in game:

You are welcome to disagree with it, but it is a fact of War Thunder and over 50% of all vehicles in game were "never used in service" let alone a lot of their weaponry.

Its not a standard for being in game and never has been.