Because those are completely ineffective ways to get anything accomplished, and have no reward even if they are successful.
It's important to remember that activists are people who are working for free. The economic incentives for me to get a website or product to e.g. remove intrusive ads or pointless warnings are completely negative: it's a waste of my time and/or money.
That's the purpose of government, so we don't have to take on these things as atomized individuals. There's no economic incentive for me to build an inch of highway.
