Felony murder is a broadly shitty law that has tons of terrible consequences. But even so, the idea that it extends to drug dealers whose customers have ODs is absurd.

Not a great example, because that is law very specifically written to get around this (which many consider a bad law for that reason, if not others). In other words, without the very specific felony murder legislation(s), your getaway car driver would not be accountable for the murder for the very reasons quoted here.