For many things, you are right (or close enough for most purposes). For many, many other things, including the some of the things we care about most, the "true reality" is not so easy to discern.
(A huge number of other evidences that sober people don’t have a full grasp of reality also exist: people misremember things all the time. People mishear things all the time. Check out that internet debate about the black-and-blue or gold-and-white dress!)
We have evolved to perceive some aspects of reality (the ones where perceiving them improves survival/reproduction) and to not perceive many other aspects of reality because those aspects of reality do not affect survival/reproduction success enough to make up for the cost of having the more accurate perception.