Because this is the most well-known strategy in gambling and can be a trap for novice gamblers, because they only think that it is important to have large capital and keep raising bets because they will definitely get a win after several defeats, novice gamblers may not know about casino limits, and after they experience it, they understand that this is not an easy strategy to be able to benefit in the long term, several attempts are possible but in the long term it will only bring the player to lose all of his balance.
Is there any effective strategy that would allow you to win at gambling all the time? I don't think so. In fact, any strategy will be futile sooner or later because any casino will always keep track of it and, if necessary, make the appropriate restrictions. So I think there are only two options: either the user gambles for fun and relies only on his luck, or he tries to wager as much as possible to win prizes in leaderboards like high rollers do.
Exactly what I was Going to say, but then I will still like to make it categorically clear that even casinos do not smile to gamblers who win constantly, based on several experiences I've come across on this forum and even outside this forum, Casino won't hesitate to limit any account found to be constantly winning on any game, and to be more accurate, limiting is what bigger and more reputable casinos do, but for the smaller casino, it's an outright ban, and they may even find one or two non existent rule to accuse the gambler of breaking, so as to enable them confiscate the user's fund.
So even if the gambler is really good at betting, the gambler will still have on purpose lose some games to maintain a good betting record with the casino, to avoid being limited, so in other words, we can conclude that there is really no way to consistently, without failure or lose, making money from gambling.