by Seth Godin.
The successful cab owner knows this:
* Every ride is custom
* People choose a cab precisely because they can ride alone, on their own terms
* Empty trips are part of the job, and it's okay, because the next ride will pay for it.
On the other hand, the person who chooses to run a cruise line knows:
* Every cruise is designed by me, and people sign up precisely because I chose well
* People choose a cruise ship to be with other people, to benefit from economies of scale and to be part of something
* Empty trips (or worse, half-empty trips) can put the line out of business
It's pretty easy to get into the cab business. Do a few rides for friends, then list online, or join Lyft, then go full-time.
On the other hand, it's much more difficult to get into the cruise business. There's a critical mass, and the minimum number is a lot more than one customer.
Each business can be a good one if you do it at the appropriate scale.
The warning, and the purpose of the metaphor, is to realize that it's not a matter of gradually going from one to the other.
Remember that running a taxi is a fine sort of business, but don't expect to turn it into a cruise ship. And vice versa.