Sure... the same "no idea" (sic) that Microsoft had when fighting the Mac with Windows --sorry-- with DOS back in 1984. Guess who won!!!
If you sell to 1 person there is no point, but if you sell to 1,000 million people as today, there is the profit and the strategy. That is the M$ business! It seems that both Apple and you are blind on this. Again, the same mistake. History repeats.
History is always a little more complicated than it seems and volumes have been written on this. For instance, had DOS rather than Windows had to compete with the Mac who knows what might have happened. Granted IBM were helping DOS against Apple in mainframe environments. It was Jobs who made the catastrophic mistake of trusting Gates with a developer agreement to create Word, Multiplan etc. for the Mac and supplied a Mac and early Mac OS to MS. As I am sure you know, Gates had this reverse engineered it to develop Windows, all non disclosure agreements aside lol.
Yes, opening up Mac OS (now called Windows) to all comers made MS a **** load of money. Had Jobs been of the mind set then to license Mac OS to the likes of IBM in 1983/84 rather than stick to his guns to be a hardware developer it would have been interesting for sure. It is most likely Apple would have been the better partner since they were the true developers and they could have left MS in the dust one has to assume. MS had not developed anything much themselves at that stage, even DOS was purchased (or shall we say one version of DOS was).
Somewhere in a parallel universe ....