I'm going to go out on a limb and say what's happening to this guy is an anomaly. Every judoka or wrestler I know thinks bjj is great. Smart people cross train. In my judo gym, which has produced multiple national champions, we don't use "pins" for newaza. It's gi bjj.
In what kind of match? A Judo match? A wrestling match? MMA? no, no, and no.
Yes, cross training is the right idea. But you probably only train with progressive minded people, which although a good thing, isn't how all people think. There are still a lot of traditionally minded people out there.
The match I'm talking about is what the average person would consider to be the purest cross styles match. That basically equates to early MMA. Both people can use whatever techniques they want, there aren't any time limits, and they just fight until one submits or is otherwise rendered incapable of continuing.
I'm aware that there is a lot more to martial arts than just those kind of matches, but that raw early MMA type of match up is what the average person intuitively thinks of as a style match up. And although there have been exceptions, BJJ has demonstrated that it will win those types of match ups the majority of the time against the traditional practitioners of other arts.