In that you are absolutely right, as long as we can make or have a faucet it is necessary that we take into account two things, the first, the money collected is not much, it is necessary to test games, and second, the money that is collected on almost all platforms it is non-withdrawable, unless you play on a site like freebitco.in which really is a platform that has never had 'rpbelmas' with its faucet and its system, which is fully withdrawable there, there are different types of According to the casino's point of view, each one has their respective ways of doing things and putting them in context to play.
Casino faucets gives gamblers a chance to test the game using that collected faucet rewards, unless you are also lucky and you managed to grow the money and meet the required wagering requirement, you will be able to withdraw and enjoy the amount, but for sure, if there's someone who can still do that, maybe few or very unusual.
But we never know when luck will back us up and allow us to withdraw decent amount from the casino who offered faucets.
Casino faucets are more important for those who do not have much money and they can use this faucet money to gamble and increase it over time.
Though for most people faucets seems useless but for some, it may be everything. Though i think that faucets do not give much money, but i think betfury and other gambling sites should have faucets, as it is a good marketing tool also.