It's because majority people know that Monero is a shitcoin. The more people accept Monero, the harder to run a node.
Larger block sizes have a negative impact on not only storage size but also on verification time.
Discussion
So your argument is it will be so successful and popular that it will be hard to run a node?
Or do you believe Monero will remain an irrelevant niche?
If the latter then why are you worried about the size growing too large? (not even considering consumer tech is not static and protocol scalability improvements - a strength bitcoin doesn't really have)