It's meant to be a quaint remark, given tongue-in-cheek.
In one sense, any sporting match is "pointless." It's just a game between two teams. We can root for one side or the other, but who wins the match doesn't really have any real effect on society.
Moreover, cricket matches are known for lasting a very long time.
So, deep pointlessness is an oxymoron of sorts. He's saying that games can last a profoundly long time, and be almost addicting to watch, even though the final outcome won't really matter in the long run.
Still, it was fun for him to do, so, he misses it, living in the U.S., where it would be very difficult for him to find a good cricket match (and a good English beer, too, apparently).