i mean, i’m not arguing for this position necessarily. i agree with you.
that said, in practice, the “bad data” comes out in the wash. for example, all of Reddit is likely in their datasets. who knows what their data cleaning process is like, but diversity in the data is generally a good thing from a training perspective.
hot take: the app is usually a better experience. the browser sucks for so many reasons.
that said, i refuse to download Twitter, TikTok, Reddit, and a few others, and i resent them for defacing their own site to try and force conversions. but if there is an app/company i really utilize, i prefer the app every time, from a UX perspective.