Really, no one will have a drinking problem from fish oil capsules. There’s little there for problems.
Ethanol is just common drinking alcohol. I have never heard of anyone getting tipsy or drunk off fish oil capsules.
I also have never heard of the proof rating of fish oil.
This is all bizarre.
Here is another discussion.
Focusing on inebriation with ethanol (ETOH) consumption is short-sighted.
ETOH is metabolized in the liver, where alcohol is oxidized into the toxic compound of acetaldehyde, and acetate. The byproducts generated during ETOH metabolism affect the liver by increasing lipid accumulation, inflammation, and fibrosis.
When liver disease is a concern, ingestion of medications and supplements which depend on liver metabolism should be used with due caution.