A July 11, 2023 article in The Wall Street Journal ("Sex, Drugs and Spreadsheets") described the surge of addiction among Wall Street executives. The function of all drug use is simply to feel better though healthy life changes are made by struggling with life issues, not drugs or medication (which can have wide-ranging side-effects).
The tendency to use drugs derives from early family issues during development. Thus addiction is basically a psychological not biological issue though stopping many drugs can arouse pain and effect health. Terming it "biological" makes psychological difficulties more socially acceptable and is widely used, it being a marketing term favored by psychiatrists who compete for business with psychologists and others.
The seven-hundred-dollar/session fee reported in the article is far higher than I've known even noted psychoanalysts to charge. But therapy is a business and not a saintly endeavor. One charges what the market will bear though cost and fancy office decor are irrelevant to healing ability.