I disagree with this. I have personally tested bowmaster and wind archer. Both are pretty balanced. Thanks to wind archer's touch of the wind stance skill, it allow wind archers to cleave 6 parts in horntail or chaos horntail. Which will outdps bowmaster at most. Not only that, wind archer also have wind walk skill to increase damages, I find no issue to autopot by pet during wind walk macro as well. This is a great QoL for wind archer by Yuna. Which I believe wind archer is strong if you know how to play with the technique. (such as using stance and cleaving skill when there are more than 2 target, and use st skill when stance is down, and know where you should position when stance is down)
I believe all class has its own pro and con. Such as wind archer rely on si buff to possibly outdps bowmaster, but bowmaster does not rely si buff.