Boy. I always thought D&D was a game. I play games to have fun, I must be doing it wrong!
EDIT: Ok, I remembered RISK is a thing. Maybe not all games are fun...
It's also possible that someone isn't the best spokesman for whatever that argument might have been.
The trouble with "fun," is that different people have fun in different ways; if this wasn't both true and banal, then we would all have the exact same hobbies and preferences. Which, last I checked, wasn't the case.
So, for example, some people prefer things that provide immediate feedback and gratification; others prefer things that have more delayed gratification - and neither is "right."
To use an example I'm familiar with, I've run groups that had no "mapping" at all, and I've also run groups that absolutely had someone mapping- because that person found mapping to be fun. They loved mapping, and recording treasure, and that made them feel more of a part of the game. Different people, different preferences.
(I think that this is also one of the reasons that 5e generates so much ... conversation. It's because people are playing it in very different fashions, so there tends to be disputes at the high level of granularity over issues that are really about approaches to the game, and are instead masquerading as rules questions.)