Silly doubters.
I mention opinions or uncertainties with clear tone that it is uncertain or an opinion.
When kitaek27 says a fact, its a fact.
And if I said that being able to windmill while using windbreaker broke the internet, it broke the internet.
In all seriousness, no. The wiki isn't always right.
Its true that I would personally vouch the wiki as a much more credible source than myself, but in this case, its only half right. Ever since the G10 elf/giant balance patch, you can use windmill during windbreaker. Windbreaker buff, Final Shot nerf.
This may SEEM useless, as the two skills contradict the point of each other, but it has its uses. I can see it being especially useful in hard mode dungeons.