Sure and gravity too. Global warming was an idea invented in the 1980s after the sale of global cooling did not win the statists their way.
The benefits of trade have been known for over 100 years if not 100s of years.
Of course, if you don’t think gravity is true, you can always jump out of a 10th floor window, fly down and save yourself all that wasted time waiting for elevators. Similarly if you don’t think there are benefits from trade, you can make your own shoes, build your own house, build your own car, sew your own clothes etc. As with jumping out the 10th floor window, you will see if your life is better off if you never trade. And the good news is unlike fighting gravity you will probably live if you give up before your bad diet and self medication without any meds produces by someone else soon enough.
We don’t really have “trade”.
We have buying.