You missed the whole point of what was said.
We already know that with Etheric Light, people were still getting Dark Below and House of Wolves weapons. Gear Ascension doesn't stop people from getting the new stuff.
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It stops people from having lasting enjoyment. Etheric light are boring. I would rather run a strike or raid for a special weapon then click an upgrade button.
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Etheric light doesn't just appear in your inventory. And ascending a weapon you've been carrying around for the better part of a year is anything but boring.