Lynn won the gold glove 4 times in his brief tenure here. Rice won it 5 times in his much longer tenure. Yaz won 6, one in the era in question (77). Rice was a roughly average defender, which in Fenway's left field is fine.
THe problem here is we're comparing kids who are still learning their job to guys who came to the majors ready to dominate that job. All of Rice, Lynn, Evans, and Yaz came out the gate stronger than any of Swihart, Betts and Bradley. The talent level is simply an order of magnitude different.
We have a good group of outfielders. We do not nearly have the best group of outfielders we've ever had, ever. Heck the Drew-Crisp-Manny outfield might be better defensively in 2007 than the Swihart-Bradley-Betts outfield is right now, even with Manny dragging the 07 numbers down. Coco and JD were that good. but it is nice to have all those young guys with upside there to point the team in the direction of the future. That looks like it will be fun.