Because the data doesn't match. The author addresses this in his blog post -- essentially every country has the same graph of SWE jobs, but only the US has sec 175.
Big tech layoffs were a global issue and U.S. tech firms hire (and fire) globally. So like it or not, U.S. economic issues have a downstream impact around the world.
Sec 175 especially hurt small to mid-size tech companies (especially fast growing ones...) which I imagine amplified the problem across the board.
