If developers agreed with that position, they would just stop working on scaling solution, and only fix some minor bugs. But that would make Bitcoin no different (except for amount of hashing power) from any altcoin, since they all have pretty similar structured blockchains and features that come with it. So, even if Bitcoin just an investment for you, you still should support changes that can one day make it a viable currency for masses, because that's what will give it the biggest value out of all cryptocurrencies.