Most semiconductor vendors have now outsourced library creations (for free to end users) to services like UltraLibrarian where you pick what you want and download.
The quality however is meh.
Libraries are a very touchy subject. Most of the time, outsiders to the field just want "plug and play".
Professionals in the field? Holy fucking hell can we get neurotic. In a large company you may have more than one person dedicated just to managing libraries and drawing them to your standards instead of letting the internet do it. And there's a whole list of reasons why one may do it vs. not do so. (Schematics are a form of design expression and as such there are many standards and thoughts on optimal forms of expression, including dependency on the particular sub-industry you are)
No different than software engineers having their favorite programming language, markup language, config file language, code style guidelines, deployment workflows, etc.
I think there is actually some really neat stuff to be built here. I think layout engineers would love to be able to write down their 'style guide' that is basically a set of parameters modifying the footprint. We would have a 'common' representation, basically a definition of the package itself that would be transformed to whatever you might like for the pad/silk shapes. Something very similar to having a linter in code that would enforce company best practices.
We already provide the 'plug and play' version which looks quite alot like LCSC data and is certainly good enough for playing around with. Id really like to put some effort into standardizing this in the mid-term, seems pretty crazy to me that there are way more footprints designs out there than actual packages.
I understand as someone who has played factorio and then had an engineering friend join my game and rebuild everything so it's lined up and shorter belts
The quality however is meh.
Libraries are a very touchy subject. Most of the time, outsiders to the field just want "plug and play".
Professionals in the field? Holy fucking hell can we get neurotic. In a large company you may have more than one person dedicated just to managing libraries and drawing them to your standards instead of letting the internet do it. And there's a whole list of reasons why one may do it vs. not do so. (Schematics are a form of design expression and as such there are many standards and thoughts on optimal forms of expression, including dependency on the particular sub-industry you are)
No different than software engineers having their favorite programming language, markup language, config file language, code style guidelines, deployment workflows, etc.