There's a big drawback to trying to create a big divide between those who do not exercise at all and those who devote their life to exercise. I've seen this a lot where a person who starts out doing some form of exercise immediately gets criticized for not doing more. That's not how it works.

Working up a sweat playing a game is more than most people do and will already bring benefits. It's a whole lot better than nothing. It may become a catalyst for better things.

And, yes, weight training is not going to be replaced by cardio, because it's weight training... it's not like every person who exercises does weight training, there are quite a few pure runners on here.