Whether you’d get caught or not is a separate matter, but don’t assume that it’s legal without checking local laws.
Interesting, so buying prescription medication from abroad (and without a prescription of course) is not illegal as long as it isnt a narcotic?
Because these are usually ordered from overseas companies that aren't governed by U.S. regulations, they're in the clear. Because it's not actually illegal for you to buy it, you're in the clear.
N.B. some "nootropics" are still controlled substances. For example, modafinil is I believe schedule IV so you technically could be prosecuted though it's unlikely.
I don’t knot that steroids is a good example to support your case. Anabolic steroids are classified as Schedule III controlled substances under the Controlled Substances Act (CSA) in the United States.