I guess we will never really understand why people take drugs unless we have been there ourselves. We will never understand ones cravings.
....Lots of reasons why people take drugs and I include alcohol as a drug.
Speaking as someone who has taken drugs on a daily basis but not for over 20 years, most folks take drugs recreationally, some as escapism, some addictive, some not addictive. I've experienced most drugs except heroin - I drew the line there although offered it a couple of times: We each have our own 'cravings' be it for chocolate, sex, or fast cars - We like to repeat what gives us pleasure. Peer group pressure, thinking it's cool, are other common influences.
Creatively, most drugs (not alcohol) warp our natural sense of time and so sensations appear to be extended - We think we are seeing/hearing more in what we're focussed on. However, some people are physically badly effected by drugs and it's dangerous for them.
Those of you who drink and enjoy getting 'bladdered', ask yourselves why. Then just substitute another drug for alcohol. The only difference is that some drugs are more physically addictive, though alcohol can be extremely addictive too. Much depends on you as an individual.