No one says this change doesn't apply to people in those industries or in shift work. You have to remember that the idea is more to reduce work from 40 hours per week to something like 32 hours per week (30 in OP's case).
In this case, you can still have restaurants open late, it would just mean the schedule would be shorter for all staff.
> But all of these initiatives are focused on the wealthier office workers and sometimes factory/shift workers who are non-customer facing. But it totally ignores the service industry which is a huge part of our society (and arguably even more so if we end up working less!).
The service industry could make up for the lack of coverage by hiring another person. Giving jobs to more people.
I do believe that the question of having a livable wage (supplemented or not by UBI) is a separate issue that should not impede giving people their time back.