I respectfully disagree that price was the issue. The competition was a Sun workstation. In 1990, a sparcstation was $5k without the hard drive, a configuration that only made sense if you mounted the root filesystem using NFS, which meant you had a more expensive machine with a hard drive on your LAN.
Apple could have succeeded in the workstation space, but they were a consumer focused company.
https://www.nytimes.com/1990/05/16/business/low-priced-work-...