Soccer is a pretty data-poor environment, or at least was historically. Before movement trackers, there was very little data to play with. With movement tracking data slowly building up, I suspect that soccer analytics will soon have their "Moneyball" moment the way baseball did.

The reason baseball got there sooner is that, even without advanced player movement tracking, baseball is a data rich environment. There are ~2500 MLB games played per year in the the 30-team era, and we have at least box scores going back to the late 19th century for most professional games, and pitch-by-pitch data going back to the eighties. In addition, a lot of the most important data is cleaner in nature (pitcher-batter match-ups) and also abundant (compare ~200 pitches in a baseball game to ~15 shots on goal in a soccer game, to take a guess at the order of magnitude).

Computing power can help squeeze more information from the soccer data we collect going forward, but there is a century or more of player tracking data that we can just never ever have, since it wasn't being collected. We know Babe Ruth's batting line but we will never have the soccer equivalent of UZR for Pele. I don't know if there is a retrosheet-equivalent effort for soccer to collect stats from old film, but that would be one way to partially bridge the gap.