Nobody is saying that people should start taking cocaine. Just that you shouldn’t get your life ruined by having it / using it.
Also, knowing that what your getting isn’t mixed with mdma, amphetamines, ketamine and being able to properly monitor your dosage instead of guesstimating the purity and doing brain arithmetic is very helpful.
There’s a major difference in having the person who sells it to you wanting you to quit vs wanting you to consume more.