It's not like building the arena is a must. It's simply a safest route, doesn't mean it's fastest. Especially in Utopia, where everyone started from square one.
Some teams managed to promote through leagues and build massive arenas simultaneously, but it's probably thanks to smart and active trading.
I don't see the point of your thread, it's fine to discuss strategies, but I didn't understand your tone, it's almost like you're accusing this guy for something??