Imagine if a company like Eastman Kodak were selected to rebuild the national stockpile of medical supplies that were depleted by COVID. It's kinda like that.
Oracle sells enterprise software, and it has a pretty bad reputation in some engineering circles due to their aging technology and bad business practices. They don’t have any significant business lines in social or consumer tech AFAIK.
In this sense, they seem like they would have no clue about the needs and wants of teenagers, therefore making an odd match for TikTok
Even one of their few products useful to sole traders and very small SMBs, VirtualBox, is impossible to purchase in individual license (in the UK at least). They're almost openly hostile to anything smaller than Enterprise.