no it’s a reduction in the amount of data you need to write to chain; instead of writing in a pubkey you write in the promise to pay a bunch of pubkeys at some point, in the future

and in fact that bitcoin cant be used for anything else

then you have a promise and not a utxo, which is pretty worthless if you want to use that promise to pay someone else

so people are trying to design ways to pay each other with promises instead