No one was “tricked”. That implies some intentional deceit and I’m not aware of any stores doing this. People watching YouTube videos or looking at posts here and taking whatever the person says as fact was their fault.
8 GB is plenty for many users. If you go into Walmart here in the USA most of the Windows laptops they sell have 4 GB of RAM. I know that shocking to people in the forms because we’re a bunch of tech nerds but normal people aren’t using their laptops the same way. They’re looking for a computer to go play music, pay their bills, go on Facebook, and go to “a certain type of website” that entertains them. That’s it! They’re not doing video editing or running multiple VMs or anything like that.