Equal upload speed

Just wondering why cox does not offer equal download and upload speeds. Would the price be crazy? currently I have the prefered internet package and its 50mbps download and only 5mbps upload. Ultimate and Premiere offer 25mbps upload but why only that much? and why such a difference from the prefered package would be a bit nicer to pay for 50mbps download and at least 10mbps upload. Anybody else agree with me???