How many of them actually pay the money they promise. I doubt it. Most of them will ask you to go through KYC and still there is no guarantee that you will earn those tokens.
For a small amount of $10 I not happy to go through KYC my identity is far more valuable than the amount they are giving me.
maybe you are right to say for some airdrops but there are also some airdrops that have other requirements such as requiring to invite some friends to be able to WD and be required to do KYC for the friends we invite to be able to withdraw it directly, in my opinion it's quite difficult for me who is less experienced in that case.
you are right for some people might be the same as you but for people who pursue this they don't mind it because they just want the instant only in their own way or more or less get a dime quickly.