Funny thing is that he started his channel using these titles as a mockery of other channels eg. You NEED this thing, and with that he basically broke all the YouTuber rules to have a successful channel. People like Tom Quayle said his channel is a breath of fresh air.
Now the title thing just stuck and probably benefits his channel
The thing that I've always appreciated about John is that he is one of the few transparent and honest YouTubers, and his followers know this.
Here is an interesting video.