Um, no?
Again, "draw or sheath a weapon" is clearly using the "a" as a quantifier, and has no implication that the quantifier comes from somewhere else.
Osezno, one can draw a (thin) logical line for your Quickdraw ruling. It's not the prevailing interpretation -- and it's thin, but it's not an illogical ruling; just probably wrong.
OTOH, your false logic regarding claiming that if "a" in the case of QD means "a (for each trigger)" then one must also interpret -every- "a" in rules text as meaning multiples is actively offensive--implying that any interpretation of QD as being able to trigger multiply involves redefining the english language -- when that just ain't so.
"A" always quantifies a thing.
It always quantifies a thing as one of many.
This is a car. There are many like it.
A never identifies a plural. I have some dogs. I have a dog. I take an action. I take some actions.
You don't take an actions. You don't draw a weapons.
You draw ONE weapon.
You draw A weapon as part of THE same action to attack with THE weapon.
You don't draw any number of items or weapons as the same part of the action to use them. That's not the wording.
A. I have a dollar.
I drive a car. There are many other cars like it.
You can drive a car as long as the car is filled with gas.
RAW. You draw one.
RAI. You can draw as many as you want.
You can't magically decide in your own head when you think they meant to use "a" as a quantifier (especially when it always quantifies a thing) and when it's meant as just a random definite article.
There is NO line to your logic.
My line is draw by them having identical wording. One says you can draw a weapon as part of the action to use it. The other says you can draw a weapon as part of a minor action. You tell me how they're different.
As previously stated, there is no inflection to written language, it is about careful, selective, non-ambiguous word choice. As an aside, your word choice is borderline offensive and I ask that you mind it, perhaps unfairly since you seem to have little idea of how language or logic work.