You’ve defined escapism as trying to make your current situation ‘better’. I agree. Is weed often used to escape? Absolutely. I do it a lot.
However, can you see a situation where weed makes your current situation ‘different’ without defining better or worse?
If someone smokes in moderation without dependence or necessity, is it still escapism?
Ex. A guy smokes pot one time and after says "Hmm that was cool" and never smokes again. Was the drug still an escape from reality? Or just a different new experience, like many non-drug related experiences.