Well.. they're not. I've first hand experienced "what if they accidently charge you for who knows what" as I mentioned in my example and I recall many, many stories on HN regarding problems with subscriptions related to these "hypotheticals". Not to mention that the "what if you simply forget you even had a subscription?" is probably the most common, I doubt most people periodically check their credit cards history and given how many subscriptions an average person have, it's way too easy to forget you've subscribed to something - maybe in a heat of a moment or for "free trial" that required your CC and started charging you once the free trial expired.
Well.. they're not. I've first hand experienced "what if they accidently charge you for who knows what" as I mentioned in my example and I recall many, many stories on HN regarding problems with subscriptions related to these "hypotheticals". Not to mention that the "what if you simply forget you even had a subscription?" is probably the most common, I doubt most people periodically check their credit cards history and given how many subscriptions an average person have, it's way too easy to forget you've subscribed to something - maybe in a heat of a moment or for "free trial" that required your CC and started charging you once the free trial expired.