Let's not forget what cannabis actually is; a drug.
Cannabis does have well documented medical benefits, but that's not to say it cannot become a substance someone becomes depend on.
For medicinal users such as myself, it's very much so a solution to many problems, and when you do have periods without said substance, naturally you will succumb to your previous state, i.e. for myself, anxiety and chronic insomnia.
I do believe there is a distinction between addiction and dependence. Many such as myself depend on cannabis as a medicine to improve our quality of life, however, speaking from the experiences of many whom I know, addiction naturally sets in, to a point where the cliché of "I can't / don't want to perform said activity without cannabis".
From this, ultimately we can draw some conclusions. Firstly, addition to cannabis is not as straight forward as it is with other drugs, on account of the benefits and sustainability of the drug.
For example, cannabis addiction isn't: "if you consume X amount in Y timeframe you're an addict" or "If you need weed to enjoy things you therefore are an addict", instead (imo) a more progressive and logical way of looking at the matter, and certainly that of a medical perspective is to assess the trade off between improvements to quality of live versus that of the negatives associated with consumption of the drug.
An analogy of this is that of painkillers and other conventional pharmaceutical drugs. Many of these drugs are notoriously known to cause harm to the body, but if you where to give them to someone with chronic pain caused by cancer, it is therefore justifiable given the benefits to said persons quality of life. The same can be said about cannabis.
In summary, treat your cannabis consumption as prescription, as we do in the medical community. Consume amounts you wish, whilst weighing up the negatives you also are experiencing - however be honest with yourself. If you are consuming large amounts (relative to each individual, many of my medical friends are prescribed 90gs a month!) and are noticing negative effects, consider reducing your consumption or perhaps a t-break.
The saying everything in moderation is key here, cannabis is a well documented save drug to use for most. You can consume an Oz a day and be physiologically fine (in theory), but the benefits you will receive from it (enjoyment in the case of many) will naturally decrease.
TLDR: addiction to a drug, especially cannabis, is highly complex and dependant on the individual. It's all a juggling act between the benefits you get Vs the negatives you receive and it's down to the user's honest assessment of this to use cannabis safely and sustainability going forward.