That’s not actually true. Setting aside the fact that to build an EUV lithography system costs over one hundred million dollars (a single system ships from ASML in 40 shipping containers and has over 100,000 parts) [1], Sam Zeloof could legally build one tomorrow if he was able - he just wouldn’t be able to sell it unless he licensed patents.

1. https://www.cnbc.com/amp/2021/12/10/asmls-high-na-euv-lithog...