The Allure of Drugs?

Okay...I've never done drugs so I'm speaking from ignorance here.

However, it is my educated guess that smoking marijuana and the effects that might generate are not worth the millions of dollars that two NFL stars are throwing away because they failed to comply with the drug policy of the company that they work for.

I can't understand what sensory delights are worth what most people throw away to attain. Any insights would be appreciated.