Since everything in this is mostly common sense unless you live in the welfare world where brObama money rains down around you for being lazy and unmotivated, you can disregard the fact that I quit the Applied Economics and Management program at Cornell University after 3 semesters to spend 122 days in jail, and upon release didn't have an interest in going back. Moving on...
You see, as much as you'd like to believe that the beneficial to the sick (and to the 80% of med card holders who just like getting high so they told their doctor that they get depressed when they run out of weed, or made up some bullshit anxiety story) nature of the product dispensaries deal in should, for some illogical reason, reduce dispensaries to break-even organizations. But hey, wait a minute...the dispensary owner lives a thing called life, and life has mandatory + discretionary expenses. If they dispensary breaks even, then the owner is wasting his time, and barring someone able to work a full time job and still run a dispensary, he would soon be filing for bankruptcy, and there goes your beloved (or not) dispensary.
Also, the dispensary incurs what is known as operating expense to bring their fine product to you. Employees, rent, insurance, electricity, start-up overhead, , etc. all cost a substantial amount of money. Drug dealers (in non med states obv) don't incur these expenses as a result of their business, and due to that the price you pay them for drugs only reflects cost of drugs to them + what they determine is fair for the risk they took to sell you the drugs (typically market value). As common sense would have it, the price you pay at a dispensary reflects their operating expenses, purchase price of the budski, and profit for the owner.
If you think dispensary owners should be exempt from being in the business of making money, realize along with that there would no longer be dispensaries.