Probably JS was a victim of its own success in this regard, being both incredibly popular and incredibly long-lived, which drew hordes of amateurs (myself included) in. We all re-invented the wheel, though in my case it was more like an oblong hexagon =/ I rolled with it... but I feel terrible for anyone who has to maintain my old code after me, lol.

Most languages have perfectly functioning wheels right there installed and ready for use.

People keep reinventing the wheel on javascript because it doesn't have any.

True, but Go codebases only look the same because there's only so many ways to make a neolithic handaxe.