Mmm… I can kinda see the argument. DuckDuckGo may not be collecting your info, specifically, but anything remotely loaded certainly is.
Still, shouldn’t let perfect be the enemy of good.
I suspect the objection had to do with some misinformation regarding the Duckduckgo browser. I remember reading about the issue and thinking it was about search, too.
The DDG CEO wrote up a response on Reddit and it explains it very well. Here’s a link to the comment on the Wayback machine.