I suppose it comes down to 2 main differences.
1. It's much easier to post a good looking but badly researched piece of writing than it is to make a good video. So it's hard to tell before clicking or investing time in reading something that it's good.
2. Google knows everything about a YouTube video's metrics so can base recommendations off of much more information than it can over just the click through rate that it knows about articles on Google News. So articles with high click through rate will be recommended regardless of whether they're actually high quality which incentivizes clickbait. Meanwhile a YouTube video with high click through rate but terrible audience retention won't be recommended.