Exactly, these are not strategies but merely betting patterns that people apply to try and recover their money when they start losing, and most of these patterns tend to put the gambler in more danger because if you are losing $0.5 per bet, you would be losing $16 after 4 to 5 bets or so if you are doubling the bet amount after each loss. You incur a loss streak, and as you rightly said, the bankroll would be over before one realizes it.
I have always said that, betting patterns, or strategies if you call it that, are recipes for disaster. A gambler might not lose much if they gamble normally even after incurring a loss, but if they start applying a pattern after a loss, they are inviting the house to feast on their money in that case.
Indeed, there are some people who have strategies or patterns that they believe can make them win or recover losses that have occurred, but unfortunately this is not certain either. Apart from that, when they want to place a bet or gamble with the strategy and pattern they have but the gambling they do ends up losing, they will usually look for other references to get their new strategy and return to gambling again. The strategy or pattern they have does not guarantee that they will win because gambling in general, in my opinion, depends on luck, maybe the strategy or pole they have is just something that makes them more confident when gambling.
good statement, I would like to add that those who have a pattern or strategy but do not produce a win then they will continue like that, when they lose they will look for a new strategy and try gambling again by applying the strategy they have found, if they are not successful get the big victory they want then there will be no end to it unless they can end in misery.