I think it speaks more about what people value, how they value their time. How many people can’t afford an hour a week? An hour a month? There is almost always some unhealthy activity that takes up at least an hour of your time a month, why not substitute?
i can't think of any volunteering opportunity that only takes an hour unless it is something you can do at home or nearby. otherwise you also have to consider travel times, getting ready, etc. any activity no matter how short usually cost me a full afternoon or evening.
If you start with a dismissive attitude it’s easy to find ways to not have time.
If you start with love: “how could I help? there’s /something/ I can do, right?” then you’ll find the time.
It is truly about what we value.
and i did mention that things you can do at home are easier to volunteer for because they take less effort. so why do you think my attitude is dismissive?