can exist.

Roofs, windows, bathrooms, sometimes HVAC can be scaled > therefore big companies sprout up > therefore if you want you can choose a company that employs actual project management people and customer service people, where the scale of it smooths out some crew management ebbs and flows that exist when you’re small, and where they focus on a narrow enough type of work that the time needed to complete projects is predictable.

With other niches the market is such that your options are almost always small outfits where the owner is the sales guy, the customer service guy, and the foreman. That’s where you run into what you’re talking about.