How much of the actual information in the high resolution photos is just noise? So we buy sensors with more megapixels that just save more noise. Then we need

How much of the actual information in the high resolution photos is just noise? So we buy sensors with more megapixels that just save more noise. Then we need to buy more storage capacity, more bandwidth, more processing, more battery etc. Since the cameras have been hitting closer and closer to physical limits but something still needs to be sold... It's like people buying clothes from the mall and taking them straight to a storage building. They don't have enough space at home. And they won't have time to wear so many clothes anyway.