Secondly, an addict usually knows his limits. He would be unlikely to swallow an amount he knew would be lethal - arrested or not (it’s not worth dying over) - and having three times the “lethal” dose for a NON user is not necessarily going to have the same effect on an addict. Habituation raises the level at which a drug will cause harm to a person.
You seem to imagine that illegal drugs are produced with as much care as legal drugs. If what you say were true we wouldn't see a huge spike in overdose deaths from fentanyl.
We're not dealing with a smart person here.
Here's another thought experiment:
You can either have someone kneel on your shoulder for a few minutes.
OR
You can be given a dose of fentanyl 3x over the lethal limit.
Which would you chose? Which one would be more likely to kill you?
The fentanyl is reasonable doubt that he wasn't killed by the cop but was killed by the dealer who should be charged with murder.
If George Floyd had complied with police and got in the car, he might still be alive today.
I think he'd likely still be dead. If not that afternoon, some other.
You don't win prizes making poor life choices.