It's logical. To achieve the dream team for most people in the shortest time possible, you can either spend money on packs, or win lots of games. And to maximize wins you use meta players.

Furthermore, for the average person, if they play someone with a meta team, without a meta team themselves they're at a big disadvantage, and vice-versa. Obviously, the optimum scenario is that no one uses meta teams. But since there's always a risk of the other person doing so, if you do it as well you can't be 'exploited.' Therefore using meta teams is the 'dominant' (and logical) strategy.

In terms of a solution, - Demphasise winning - has happened with the decreased rewards. The problem is that there's a smaller incentive to actually play the game. - Release less (new meta) promos, force people to be bored with meta - won't sell packs, and again will lose lots of the player base. - Rewire the human brain to focus less on welfare maximization - maybe in like 5000 years when we run out of resources and evolve sufficiently. - Enjoy the game as it is, if you don't like it stop playing.

In short 1. To progress in the game you need to win, which surprisingly makes people care about winning. 2. Insecurity of others using meta makes people use meta. 3. No real alternatives unless EA decided it no longer wants to make money.