But this is just you. It’s not the majority. Don’t assume that you are part of the majority. This app has a huge user base of people from various backgrounds, and maybe they’re impatient and can and will spend gems instead waiting whatever number of hours.
Quite a few authors I am friends with have added this in their stories and have seen decent results from adding this. That is increased gem revenue and higher retention.
Maybe you won’t spend gems but others might. It’s presumptuous of you to assume what others will do. A lot of users are adults with jobs who earn enough to buy and spend gems on the app.