The real bottleneck is Cognitive Overload and Tactical Entrapment.
Most service owners are trapped in the "Expert's Paradox": they are too good at the technical work to let it go, so they never build the systems required to replace themselves.Systems vs. Habits: Most "systems" in small service businesses are just the owner’s habits. When the owner gets tired, the "system" breaks. True systems are documented, automated, and run by anyone except the founder.
The Pricing/Quality Trap: Weak pricing forces the owner to stay on the tools to maintain margins. This prevents them from stepping into the visionary/operational role, which in turn leads to poor lead quality. It’s a death spiral.
Lack of "Sovereign Infrastructure": If your business depends on you being "busy" to be profitable, you don't have a business ou have a freelance gig with overhead.
The bottleneck is always at the top of the bottle. Until the owner stops valuing their "busyness" as a badge of honor and starts valuing Operational Efficiency, they will remain stuck.