The "culture icons" of the first bubble are actually red-flags in some situations.
There is a balance of providing real perks, while being on a startup budget, and using fake incentives to lure in talent.
The fact is that you will have both long-houred positions and people who will work 8-5 only. Both are valuable employees, and their commitment should be based on their productivity and value - not in how much free/extra time you can get out of them.
As people get older, they have kids and they have out-of-work priorities.
This does not make them less of a person/employee/resource.
If you require your employees to work ~12 hour days - then maybe you should be able to actually pay them for each hour of work.