Loose leaf teas are much harder to steep, and if you steep them wrong, you end up with a rancid bitter flavor (for lots of higher quality teas).
To quote a song: "You could not feel sadness if you've never tasted joy" - perhaps, if he's content with his tea bags, we can let him drink his tea bags. Since switching, I can tell you first hand, that I can no longer drink tea bags, or even poorly steeped teas without cringing. I sound like an asshole, I know.
There's a great quote about not refining your tastes as it narrows your world but instead continuing to explore the availability of the world around you. It was either Feynman or Ryan Dahl. =p
That being said, I love me my loose tea leaves, but it's just a different product then bagged tea, one hasn't ruined the other.
It's not that hard with a bit of electronics: Japanese homes usually have big electric kettles with temperature control. Green tea, as an example, needs 80C I think.
Japan in general is a great example for optimizing people's daily lives without compromising on quality. There are many of such rituals to explore that are very specific to that country.
To quote a song: "You could not feel sadness if you've never tasted joy" - perhaps, if he's content with his tea bags, we can let him drink his tea bags. Since switching, I can tell you first hand, that I can no longer drink tea bags, or even poorly steeped teas without cringing. I sound like an asshole, I know.