Decentralization is always the highest priority for core.  Increasing the block size directly threatens that this since it highly favors the larger miners.  Therefore should only be used as a last resort which we are not even close to. 

Core doesn't care one bit about returns, futures, ETFs, or even mass adoption.  They cannot be bought or influenced and will protect the integrity of the code at all costs.  That philosophy is the very reason why Bitcoin is even here.  I for one am thankful for their patience and diligence.