It is because the vast majority of the people don't understand really what the internet is, how it works and therefore cannot understand the consequences.
However the effects of immigration (both positive and negative), inflation and not being able to afford a house is more easily understood by the layman.
Most people definitely do not understand those things beyond price up or more brown/black people. But they are easier to create narratives around that provoke an emotional response.
Quite a lot of people understand more nuance than you would give them credit for. You are falling for the narrative that most people can't understand these things.
Many just understand complaining about it won't do any good.
I was talking with my Mother last night about this very subject and she is social worker in her 60s.
However the effects of immigration (both positive and negative), inflation and not being able to afford a house is more easily understood by the layman.