Poppyseed bagels don’t have a psychoactive dose of opioids and cannabis contains multiple cannabinoids, so those examples are totally irrelevant.
When it comes to coffee, people are generally aware that caffeine is the active ingredient. If you ask someone, “have you had any caffeine today?”, they’re not going to say “no” if they’ve had six cups of coffee. They’re going to say, “yes, I’ve had six cups of coffee”. They’re not going to try and pick a tedious argument that they didn’t really have caffeine because they drank coffee instead of snorting crushed up caffeine pills.
When people eat poppyseed bagels they don't say they're doing codeine or morphine.
It's generally understood that "smoking weed" is likely to be a different experience than "taking THC"