This is just taking more to optimize performance.
It's not the same.
https://www.google.com/search?q=artificial+creatine+side+eff...
kidney damage. liver damage. kidney stones. weight gain. bloating. dehydration. hair loss. muscle cramps.
The fact that you estimate weed as a drug is correct - the fact that you don't realize that everything is basically a drug depending on the amount an potency is worrying.
You are so right.
Creatine is one of the most studied supplements over the last 30+ years. First, it is proven to work for athletic performance and second, it's relatively safe. The AI overview of your Google link even says no evidence of serious harm. If people have underlying health issues and/or they take way more than recommended there can be side effects - just like anything else we put in our bodies.