People like to quote famous people but just because they are/were champs it doesn't mean their words make always sense. Often quotes are not even accurate or the meaning gets 'hijacked' and the original real quote gets lost. Most used and misunderstood quote has to be the famous Senna quote 'If you no longer go for a gap that exists you're no longer a racing driver'. For many people this is the legitimation to basically divebomb everywhere, but Senna admitted 1 year after that interview with Jackie Stewart for some spiritual reasons that he lied. He took Prost out on purpose to secure his championship so basically there really isn't anything heroic about this quote, on the contrary.
'Group B was for men' is just a complacent and arrogant line. Nothing more. Röhrl said and still says the same. The guy left Audi back then because they started building 4 cylinder cars for DTM. Hard to beat such stubbornness ^^
I've said this before, every generation uses what is available at the respective time. If Kankkunen and Röhrl would've had the choice to use better and more modern technology for their cars they wouldn't have declined the idea for sure. People like to romanticise things later on but the Group B era was terrible. The cars were absolute beasts but many people died, I think we shouldn't forget that.
I believe that later champs would've been just as fast as Kankkunen if they had emerged in the Group B era.