Then neither would saying the same thing about Microsoft vis a vis Apple.
Where is the payment?
Microsoft did "steal" the UI from Apple. In fact, Microsoft essentially lost a lawsuit, Apple Vs. Microsoft, over the matter in 1997 when they were required by the terms of the out-of-court settlement to purchase $150,000,000 of Apple Preferred Stock (No, it wasn't a bailout. Apple had $2 billion in cash in the bank at the time!), continue producing and developing MS Internet Explorer for Mac and MS Office for Mac for an additional five years, and pay Apple an undisclosed sum to license the patents and copyrights under dispute for a three year period. Apple's agreement in the same settlement was to license for one year some software patents from Microsoft and bundle Internet Explorer for Mac along with Netscape in future Macs for a five year period.
The settlement was widely reported in computer industry and Main Stream media at the time. It was only several years later that the spin was started that MS "bailed Apple out of near bankruptcy."
Incidentally, MS sold the Apple stock for a tidy profit a couple of years later.
"Then neither would saying the same thing about Microsoft vis a vis Apple."
Apple paid for a proof of concept demonstration, saw no code, and the GUI was already establishd, and there were vast differences between the two. They paid for the demo with stock.
Microsoft had two prototypes, and *code*. They had it to develop apps, but not develop an OS.
There is a VAST difference between the two.