Do you get charged an overage for data used? If no, you have unlimited data. I could say I'm giving you free candy and have 1 m&m still count even if it isn't the same amount as a full bar.
What you're ranting against is speed not quantity. If any carrier allowed unrestricted full speed 24/7, those with small data use will suffer the same strained use as someone using the network the way you would a home ISP and that isn't exactly fair. I don't get this entitled mindset of people thinking a wireless provider should be able to produce the same experience as wired home ISP.