It is because it's main marketer had no interest in seeing anything but its own logo on their devices, extrapolate that way of thinking into other business decisions and Macs are exactly what he wanted.
-rgdot
Don't give Apple too much credit for the Mac. I think it's more that Apple was fortunate enough to come out with the Macintosh about the same time as Adobe Postscript first appeared and laser printers were becoming affordable.
Bit o' history: The combination of a 300dpi Laserwriter and Macintosh II (loaded up with
Aldus PageMaker) was a pretty awesome proposition at a time when having a service bureau typeset a page on a
Linotronic Typesetter (and outputting to 600dpi "film") ran about $15-$25
per page.Desktop publishing was the "killer app" that made the Macintosh and secured Apple's future. (Just as the spreadsheet
Lotus 1-2-3 did for the IBM-PC.) Some years later,
Quark Xpress,
Photoshop and
Aldus Freehand cemented Cupertino's leadership in 'desktop' graphics - and Apple never looked back.
If Apple was clever about anything it was coming out with the legendary then $4000 LaserWriter.
In an era when other laser output devices went for $10K and up, the "LW" was a bargain that corporations and graphic designers couldn't scoop up fast enough. It's been said (I think correctly) that it was the LaserWriter that sold more Macintosh computers than anything else Apple ever did by itself. And Apple knew it. They took great pains to make sure it wouldn't interface with any hardware but their own.
It used to be fairly common to go into companies with 100s of PCs and find a single Mac or two sitting in a back corner under the watchful eye of a secretary (remember those?) for communal use whenever "hi-rez" output was needed by some boss.
Too bad the "dog in hayloft" mindset has since spread now that Apple has shown tech companies the way...