Specially if they got $2.5(for surviving a week) in their pocket and there is literally no "humidity dome" out there to buy
Providing enough moisture(humidity) for the cuttings/clones which doesn't have a root system(yet) and can't absorb any water from the medium, until they establish one.
You eventually will Yeah, you may try another method or simply achieving the same by raising the RH of you growing area.
Why would you not? (Not playing a cat and mouse game. Just trying to help you and figure out why would you think that you won't use a clone "ever" )
Clones provide a way for you to keep producing more plants without paying for and waiting to germinate more seeds.