Why?
Millionaire sportsmen on the government dole.
If some city wants to build them a $1 billion stadium, why would the citizens of Oakland want to compete with that?
Connecticut government can’t even properly manage a $10 million stadium for minor leagues
https://sports.yahoo.com/norwich-consider-future-30-old-003200706.html#:~:text=The%20%2410%20million%20stadium%20opened,Giants‘%20AA%20affiliate%20took%20over.