I may be in the minority here, but if I want the opinion of Redditors on an issue, I will use a search engine to look for it specifically, thus knowing the provenance of the information I am receiving. I don't really want the corpus of Reddit data influencing the output of a generative AI model...because it's Reddit, after all... Even though I am pretty sure it is already included in the training dataset already... I…
On the other hand, some random people's opinions in a Reddit community with -apparently- no further agenda seem somewhat more honest.
Not that the answer is better but it gives you new data points in your search.
Basically, it's not one or the other, you can use both tools and that's probably why it makes sense to include Reddit in AI models (which do this job for you automatically)