This is 100% true especially stupid libraries that are someone's class project. And JavaScript developers are so used to dependency hell that one of my developer imported 3rd party package for date formatting.
This seems to be a similar situation to the Bootstrap fallacy where you use the same frameworks every time you make something in a language to make it quick and easy for developers to work on all of your company's projects by just learning one. Using the same familiar libraries is great for reducing the amount of time it'll take to train someone to work on and maintain a large portion of your company's tech.
I am confused, are you using MomentJS for fancy output like 3 days ago etc or for simple output like 5/31/2020? I can see how it is useful in former case but seems overkill in later case.