I've never seen an innovation that wasn't the same as some other piece of code with different variable names. It's like the old joke about how every piece of software, given enough time, gains the ability to send email.
It's like saying that all languages are the same as other languages with just different tokens and semantics. Sure, but those differences are what defines a language.
When something is "the same as some other piece of code with different variable names" it becomes it's own isolated solution, be it a library, framework, service, or software. We typically don't run our own SMTP servers, don't write our own databases and don't implement TCP/IP stack from scratch.
When we're not doing all those things, typically what's left is innovation: i.e. building something that doesn't have an existing generic solution.
