You could say the same for opiate users but there's regular reports of kratom use amongst them. Kratom is just a herbal tea.

Kratom does not contain opioids and very little is still understood about it's pharmacology.

It is not the same as drinking coca tea for cocaine addiction.

Yup. Lots of opioid users use it to get off of heroin and other drugs.

Why is that?

Coca tea is far, far too weak to even get a similar effect to cocaine. For example, It takes ~1 lb of coca leaves to get 1 g of cocaine using chemical extraction, so the tea doesn't even come close.

Most coke addicts will switch to amphetamines and booze, which gives similar dopaminergic effects.

This is a bit of an exaggeration. 1 gram is well above a typical dose.

https://en.wikipedia.org/wiki/Coca_tea

>A cup of coca tea prepared from one gram of coca leaves (the typical contents of a tea bag) contains approximately 4.2 mg of organic coca alkaloid.[1] (In comparison, a typical dose (a "line") of cocaine contains between 20 and 30 milligrams.[2])

It's fair to point out that there is still a discrepancy and many habitual cocaine users have some tolerance to the drug, but it's not impossible to drink five cups of tea. Also, it looks like you'd need more like half a pound.

A typical ingested dose is close to 200mg or so which is still a fifth of a kg of raw leaves. (A 200mg dose lasts longer than insufflation, about 4-6 hours, and during that duration is about as strong as insufflation.)

A "typical dose" is 40-60 mg, lasts 45 minutes, and leaves you wanting more. A coke addict will need at least a gram no matter what they're doing, hence why a gram is a benchmark for coke use.

Nobody is going to drink 10 cups of coca tea every 45 minutes. They're going to pop adderall and hit the bottle.