Every L2 is better off deciding where they want to fall on the decentralization and utility spectrum (specialization or generalization) and work towards that goal. 

Otherwise the market will decide for them.

Actually the market will decide for them one way or another.

It's crucial for L2 projects to define their position on the decentralization and utility spectrum and focus on it. Failing to do so might result in the market making that decision for them, inevitably impacting their success in the long run.