Reading, getting a massage, spending time with friends, or even just taking a nice bath can be considered crutches
Those activities are clearly not crutches in my opinion. They are plainly what life is about.
Reading for feeling or generate new thoughts/ massage for a healthier, enjoying the sensation of being in one's body/ exerting your body in demanding sports for extreme sensations / spending time with friends to have good time together or having their feedbacks and exchanging emotional and material support... all of these activities one form or another manifestation of the meaning of an individual life.
Drinking or smoking takes away from life. They may provide temporary comfort acting on dopamine and opioid pathway but they fulfill no real psychological need, leaving user with only yearning and wasting the precious neurotransmitter to motivate and enjoy meaningful life.
Crutches are the back up solution for people without the available resources (time and money) or the opportunity to monetize their strengths.
Many situations may call for crutches. Being laid off, being stuck at an unenjoyable job, being at war, putting your personal needs aside for survival, to withstand harsh time with scarce resources, having lost motivation after a great failure and loss, etc.
In the end, everything may feel similar because the brain doesn't distinguish between the source of dopamine and opioid. But there's one side that is tied with the love of oneself, and the other that is hollow and disconnected from all reality.