See the great thing about this is that’s exactly the sort of thing the internet thinks is cool, not because he’s successfully shared a “life hack”, but because that’s adorable. He’s one of those YouTube Grampas people watch because the videos are kinda soothing and cute and low-to-no-discourse and usually have something neat in them that you honestly didn’t know anything about, like listening to your own grampa assuming you have a decent one or what you wish having a grampa was like assuming you don’t. Plus he’s fluffy! He has Old Friends Senior Dog Sanctuary type appeal.
tl:dr Asgore has an incredibly popular and cute YouTube channel and/or blog where he just chats about nice teas.
honestly just really like undertale 