This is also why this (very good) advice is not so easy to follow in real life. You need multiple skillsets.
Guy owned two carwashes in Cary, NC. Thought technology could enable mobile carwashing. Got connected with the right technology people ...
If you're not as well placed as the incumbents at the core product (salon, sure), software will not save you.
If you're better placed than the incumbents at the core product, software doesn't matter.
If you're (roughly) equally placed as the incumbents at the core product, software can help you, but it will likely take a while to realize any competitive advantage.
And, I say placed, because there are a lot of factors at play. There's the quality of the service/product (itself a huge set of variables), pricing, location, and availability, to name a few. None of those will custom software directly help you with.