It is ridiculous, and I think people latch onto the per kg cost as we can all visualize what a kilogram is. But you can't just say "mass is cheaper now" and then put 100 customers on one launch. If any one of them fails, it affects everyone, just as it does now. It takes 2 years minimum to develop anything new for space now, and in joint missions everyone delays everyone else constantly. It takes at least a year to get a license to communicate to a spacecraft. SpaceX has hundreds of requirements for its customers and has a 2 year schedule from discussing those requirements to launch, just like every other provider. Longer of course, for multiple customers on one launch.
Making something lightweight but stiff is one of the easier problems to overcome. And yes, you can use a raspberry pi in space, but even SpaceX won't let you connect a raspberry pi to an antenna actuator (for the radio you don't have a license to operate) and a simple battery, in a mission with a hundred other customers and let you say "well the launch cost is cheap so I don't care if it fails".
Sure, things can be made better through standardized carriers, AWS ground stations, etc, but Starship will not be a gamechanger overnight, at least not for any small player.