Is there not a standard position for horizontal traffic lights?
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I will agree that anyone lacking an ability is, by definition disabled.
Of course, there are many people who are not able to write with their left hands, and that is a disability, but being as over 80% of the population shares it, we don't call it one.
There is only a small percentage of people who can write with either hand: my maternal grandfather could do this.
When I was young, I could hear whether a TV was on with the volume turned al the way down by a very high pitched sound that all TV's make, but apparently only I could hear. I seem to have lost this ability, or perhaps TV design has changed.