I guess you have to use the tools of the time... If the models are used correctly, I believe you can generate a decent forecast. I guess a good experiment would be to only rely on observational data for a couple of months, and then compare the number of good forecasts to the number of busted forecasts. I'm guessing the person NOT using the forecast models would have a higher bust rate, regardless of how the person using the models "pushed" the data.
As for "data pushing"... Isn't that what forecasting is all about anyway? A forecaster takes the available data, puts it into a format the public can understand, and pushes it out as a forecast? I bet if I told my mom that "The NAM is forecast 0.50 inches of QPF, while the GFS is only at 0.35 inches... The snow to liquid ratio is 20 to 1, with a chance of convective banding associated with CSI and even some CI" - what do you think her response would be?
And in my opinion, a real "scientist" isn't a forecaster... A scientist is someone who STUDIES and RESEARCHES a topic (at least in the met. world... I would say Fujita was a "scientist" versus a "forecaster"). Sure a met. "scientist" and a met forecaster might have the same knowledge, but how they apply themselves is completely different. A scientist isn't trying to please the public with a solid deterministic forecast.