A lot of illegal pot is now being grown by Chinese nationals. Have you considered how easily it could be contaminated with other drugs like Fentanyl?

This contamination could be either accidental or intentional.

Look at how much illegal cannabis is now being grown in the US by illegal aliens, particularly Chinese nationals.

https://www.politico.com/news/2023/03/21/illicit-cannabis-china-00086125

Legal cannabis, bought in states where it is regulated is probably a lot less risky.