You're comparing a shot through a hurricane to a shot that's not through a hurricane. It's a purely academic and functionally meaningless exercise.
And here is where you are failing to see what is being said.
Allow me to simplify (read: streamline

) the example a bit.
Instead of two snipers in a hurricane, let's use two opposing forces (can be anything (really) having a gunfight in a warehouse.
The terrain effects both sides equally.
- In 6e, this results in no change in the rules.
- In 5e, there might be situational modifiers applied to both sides.
Now, the fear - and I will say it: the possibly unfounded fear - is that when you introduce something into the combat that affects both sides equally, 6e won't reflect that.
In the warehouse example, what happens when someone "drops smoke" either through a smoke grenade, spell, spirit power, whatever?
- In 6e, as long as neither side has Thermographic vision: Nothing changes. At all. In spite of their being... Well,
situations that equally blinding both sides would be beneficial, in 6e there isn't any change to how the game plays.
- In 5e, both sides get Blind Fire penalties (if neither side has Thermo) allowing your side an easier time withdrawing - or even advancing to a better position.
So comparing shots in and out of a hurricane doesn't have to be academic at all.