People who have had some experience with it are their strongest opponents.

The context here is clear. It is not about medicinal "drugs" which should be obvious. If you have need to split terminological hairs then you does not understand the context, and if you do then this makes your argument unhonest and invalid.

> any discussion that doesn't distinguish between pot, LSD, heroin etc is just pointless.

No, that is any discussion that calls for general drug legalization because "some of them are not that bad".