I take the opinion of the sibling comment. These short form videos are heroin. And as a service provider YouTube needs to offer the number one in-demand product if they want to maintain clientele, even at the cost of their "core" product (medium to long form video).
"The junk merchant doesn't sell his product to the consumer, he sells the consumer to his product. He does not improve and simplify his merchandise. He degrades and simplifies the client."