That reasoning would make every conceivable icon a valid target for inclusion.
To actually get the character included, you can't just reason that it might be used in a certain way, you will have to demonstrate it with actual and authentic use in the wild. The accepted proposal for the inclusion of the power symbol is a nice example of how this works.
If you can find a bunch of printed manuals or books or websites that actually use this icon in this manner you might be able to submit a successful proposal.
The web is full of those symbols, so I'm sure there are books (or online resources) explaining them. And if not, someone should do something about that.
