It's not always about growth. Making it easier to meet your needs like this project does, replaces the need for that piece of income/job/growth so is still an economic positive in that way.

This easier path to consumption means the time/effort needed to own these things previously can be redeployed in a productive way.

Ideally I'd guess because people use less money, can make savings, can start companies/other useful activities.

It won't, but who cares? Most of the jobs that go into producing these goods might soon be replaced by AI anyway.

Meanwhile, by setting up a physical store where people pay a fee to "borrow" things, instead of helping them borrow directly from one another for free, a job has been created for whoever works at the store. The obsession with job creation only goes to show that a lot of jobs are inefficiencies waiting to be eliminated.