As you've mentioned, you're only looking at overdose by healthy individuals, and in the case of both paracetamol and ibuprofen you'd be hard pressed to overdose

As you've mentioned, you're only looking at overdose by healthy individuals, and in the case of both paracetamol and ibuprofen you'd be hard pressed to overdose accidentally. If you're making a concerted effort to overdose $10 vs $1 is likely irrelevant, particularly since they're both over the counter and trivial to steal. What makes ibuprofen dangerous is that people tend to believe it can be taken safely to address arbitrary aches and pains. However, the kind of people experiencing aches and pains (beyond a common headache) tend to already be on some other form of medication. More often than not, these medications are either NSAIDs or steroids. Both of which interact poorly with ibuprofen, given that it is itself an NSAID. Paracetamol does not suffer from this issue. I know little of how THC and CBD interact with other drugs people are likely to be consuming. However, drug interaction would need to be taken into consideration. As would subtle effects on mental state; focus, lethargy etc.