Earlier quoted context omitted.
I think this is largely the problem with mobile phones as well. Like you probably aren't going to go mad or get rectangular eyes or whatever, but you can just sort of sedate that sensation of boredom with scrolling reddit or facebook or whatever, which does all of bupkis for making us happy in the long term.
This is the same argument with all consuming vs producing. It's why there was a moral panic in the 1800s over Jane Austen style fiction, in the 1930s over radio, and so on. Being addicted to cannabis is not really any different to playing computer games 12 hours a day, doing endless marathons, watching sports, investing, or many similar activities.
you can do something else while you listen to the radio or smoke pot (e.g., clean your house, hang out with friends or family, with weed you can even read or program)
phones and books both consume your attention, but a book at least demands a bit of effort to follow and might introduce you to new ideas or vocabulary, even if you're reading pulp fiction
on the other hand you can scroll twitter or insta or watch tiktok absolutely mindlessly, and doing so will tend to become a habit all while it chips away at your attention span and your willpower
weed can make boredom feel ok too, and can certainly affect attention, willpower and memory, but if used in moderation it can also magnify your curiosity and sense of wonder, help you introspect, etc
cannabis is a powerful entheogen and it deserves far more respect and restraint than it currently receives
smartphones give us enormous powers but they can also exert massive power over our minds and actions, they too should be treated with caution and used with far more restraint
cannabis might make you lazy or suggestible, and it can even be dangerous for some people or if used irresponsibly, but it won't spoon feed you mind-melting pablum or ads or propaganda or spy on you