Maybe the reason why people don't see bingo (or lotteries) as forms of gambling is that the risk of addiction is perceived also as lower, compared to other games like poker or slots. We make the difference between soft and hard drugs, so I would say that we unconsciously make the same comparison when we think about different games..
Good point, though hard drugs or soft drugs, people can still be addicted to them just the same. It's just that the time they need to spend in order to finish one game or sessions is longer than those on casino games and card games, plus the usual prize is lower, so are the stakes, so it might seem that no one gets addicted to it as the effects aren't as pronounced. But yeah, OP is write, people still get addicted even in such things, so the key really is moderation, as with everything too, of course.
Maybe for some, but I see a lot of people most of them are older ones they play bingo almost everyday and more than half a day , they even eating their breakfast and lunch while playing bingo, some people even neglect their child so that they can play bingo. It is always depends on the people who are playing if they are disciplined enough.