If motorcyclists had the power to demand common sense policy improvements, filtering would be legal everywhere, and cities would start adding PTW (powered two-wheels: motorbikes and e-bikes) lanes alongside the current acoustic bike lanes.

It's a relatively small constituency. Most politicians don't want to upset the status quo to advocate for them. A lot of non-riders have enough negative experience (hearing scary stories or being startled by delivery drivers working within the current system) to actively add friction to the conversation.

For instance, NYC's current chief-of-police is a nepobaby. Her mom is a high society type who is afraid of bicycles, so the police have been actively abd specifically harassing cyclists this year.