Abusing copyright strings to trick SW into thinking it's running competitor's PC

Along similar lines, the Sega Genesis required games to trigger a routine in the console to show "Produced by or under license from Sega Enterprises LTD." at bootup time, attempting to use trademark law to force game publishers to pay for a license from Sega to build games for the console. The court ruled that copying the code to trigger the message was not copyright infringement and the message itself was not trademark infringement because Sega's own design forced those things to make the hardware work.

https://en.wikipedia.org/wiki/Sega_v._Accolade

I can understand why they would expect copying the code to be a copyright trap, but I'm confused why they expected merely displaying the message to be a copyright trap at all. Why world it be copyright infringement to falsely advertise the vendor? To my layman ears that sounds like claiming that lying about parking somewhere would constitute a parking violation, which makes no sense. If anything, wouldn't it be a trademark violation or false advertisement or something else?