Thank you for the question. The Bible addresses subjects in differing ways - some directly and others indirectly. Not every vice or specific indulgence has been extant from the beginning - new ones are contrived by fallen men regularly. For instance pornography was not specifically mentioned in Scripture - because the printed page specifically pictures was not available. However, the Bible provides principles and verses which when properly understood condemn the practice of lust, impurity, disrespect for women, pondering immorality, and "gazing on a virgin." (compare Job 31:1). Hence to understand the Bible and the proper use of it eliminates the demand for "proof-texting" - that is, requiring that something be addressed specifically and directly before accepting it as biblical teaching. If something is addressed in principle or a category of indulgences be addressed, then anything falling into that category is equally and effectively treated. Since marijuana is indeed a drug (in that it is addictive and alters one’s mood or mind), it is treated in Scripture through principle. I assume you are aware of the teachings of the Bible that condemn the use of substances that are addictive or mind-altering - cp. Ephesians 5:18;
1 Corinthians 6:12; and a host of others concerning the damage done to the body through the inhalation of smoke, dependence of something to bring calmness to the soul other than God’s Spirit, etc....
To me, this response is objective; it would be subjectivity that would produce any kind of justification for something treated in Scripture by principle.
Hopefully this can be of help.