Arguably, yes.
Should Microsoft have not been allowed to sell operating systems and still survive from selling BASIC interpreters? Should Nintendo have not been allowed to sell video games and still be selling playing cards?
Every company that is interested in survival takes profits from an existing business to start a new one,
Toyota shouldn't have to sell their first new car off the line for 100 million to pay for the entire manufacturing line.
Your first SAAS customer shouldn't have to pay back all your costs.
Can you plan to break even after your first month of sales? first year? 10 years?
Amazon runs two sets of infrastructure “CDO” and “AWS”. It’s a myth that Amazon used excess capacity to start AWS. AWS was always built out as separate infrastructure outside of AWS.
Some Amazon services do run on AWS. But when Amazon runs workloads on AWS, for internal accounting, they are considered a customer.
Source: former employee at AWS
What about OpenAI?