How about the broad anecdotal consensus that Duolingo, a gamified language app, famously does not do much if anything to prepare people for conversational fluency.
"broad anecdotal consensus" very scientific. i don't disagree, but is it better than youtube? tiktok? instagram? (cocaine? meth? fentanyl?)
Multiple things can be bad for different qualitative reasons.
I don't disagree but something less bad is better than something more bad if those are the only two options. I only said Duolingo was better than Youtube. Duolingo is nuts. I get my children's spam from them and it is this crazy emotionally abusive manipulative therapy talk nonsense trying to get them to use the app. I hope they are using AI to write that. LOL. I can't imagine the actual human who would do that for a job.