Some of the most entertaining football so far has been played by teams who aren’t expected to accomplish much. Peru, Japan, Costa Rica (in the first game), Senegal. While some of the ugliest football has been played by the more accomplished sides. Not to mention the fact that the the World Cup rarely goes according to plan (I.e. “the big teams always wallop the minnows,” countered by Spain, Portugal, England, and Italy all failing to get out of the groups in 2014).
I don’t see much evidence to conclude that expanding it to 48 teams would make for a less competitive tournament. Would love to see those random, uncynical teams getting their shot.