This isn't stealing in the "good artists copy, great artists steal" sense. This is just straight copying/plagiarism.

To "steal" effectively (in the Steve Jobs sense) means to pull details into your own work that are invisible to the naked eye. E.g., I'm going to "steal" the concept for DuckDB's new quack protocol as inspiration for handling a similar issue in my own embedded DB. It will exist as its own implementation/code, but the central idea or "aha" is what's "stolen."