Cannabis has far more variety than alcohol since it is not only one drug. There are hundreds of different cannabinoids that each user experiences differently. Each strain is developed for different compounds and effects. There are strains even “speedier” than coffee that actually give energy and focus with close to zero impairing compounds (some of the true Cannabis Sativa strains with almost no Cannabis Indica genetics).
Unfortunately the very true Sativa strains are not commercially viable yet since can be up to 4X lower yields so only private growers can experience the full variety at this time. This is why people say commercial cannabis is often very sleepy and feels like on another planet (those feelings are linked genetically to cannabis indica which offers 4X higher yields/profits).
Where cannabis is illegal, nearly all the product falls into latter Indica category since users are never even sure what they are buying. Legalization is actually helping the development of the less impairing Sativa strains due to ability to invest in and accurately trace strains in the long term.
It is even possible for someone at home to breed their own strains optimal for their own medical purpose. Custom made medicine essentially for free. They choose the plants that best help with their condition and breed them until find the best genetics for themselves.
Many strains have ZERO impairing compounds and used by grandmas as medicine every day (usually through pills or tinctures). They are classified as hemp under federal law and not “marijuana” so you can order through the mail right now
“There are strains even “speedier” than coffee that actually give energy and focus with close to zero impairing compounds (some of the true Cannabis Sativa strains with almost no Cannabis Indica genetics).”
That would be Durban Poison, an original African landrace that sits at about 25% THC when grown outdoors at home.
Indicas are the disabling varieties due to their secondary cannabinoids and turpenes. Oddly some people prefer that disablement.