Sometimes, boundaries help you make tough decisions.
If you build your company with the policy that you'll never run an ad, it makes it even more important that you build a remarkable product–you'll never be tempted to compromise and try to make it up with hype.
Same thing goes for organizations that refuse to pay bribes. By eliminating situational decisions and grey areas, it changes strategies from the top down.
Or perhaps you're not willing to pay overtime, regardless of the emergency, regardless of how late the project is… it makes it far more likely projects won't be late, because they're designed to ship without emergency…
Rigidity is rarely your friend, but well understood boundaries make decision making a lot easier.