The thing is, CCGs are an evolution of sports cards which have been around for over a century. (Although interestingly enough, the first baseball cards showed up with chewing tobacco tins afaik) So there is technically a long history for random card packs. And there is something to be said for the fact you can trade or just flatout buy the cards you want vs. closed ecosystems where you can't forward them to the next year edition of the sports game, trade, or outright buy them, etc.
The legislation in the US is actually the lesser of concerns for EA: The majority of their Ultimate Team revenue is from Fifa which is by far bigger outside of the US. So if the EU passes legislation that heavily regulates or bans them, its still GG.
"Think of the children" is a trite argument these days, but there is something to be said for inundating children with these sorts of vice-based systems from a young age and normalizing the behavior.