Feel like this is a you problem, let the guy smoke weed, it's not the worst thing he could be doing tbh, just kinda a monetary drain and smoke isn't super great for your lungs but generally its better than smoking a cigaret
It has anti-inflammatory and antioxidant properties
This process can reduce part of what reaches the mouth and lungs, but it does not remove everything in smoke
Nicotine can be absorbed into the body in various ways: through the lungs (e.g., cigarettes, heat-not-burn, or e-cigarettes), the mouth (e.g., Swedish snus or nicotine pouches), or the skin (e.g., nicotine patches)
But Schwarzenegger has two upcoming films he shot before the SAG-AFTRA strike, Scott Waugh's prison thriller Breakout and David Sandberg's long-delayed sequel Kung Fury 2