Players back then may not have been as good in the field as they are today, and that has to do with a number of things: the quality of equipment (balls, gloves, cleats, even uniforms), the quality of the playing field (none of them were groomed like they are today), and the athleticism of the players. No one would argue that today's players are better conditioned than the players of that era, whose off-season didn't consists of meeting with personal trainers and nutritionists three times a week.
You're missing one key thing, though. The first World Series was televised in 1947, and even then only a few hundred thousand homes had television sets. All of the footage you see prior to World War II is almost exclusively from newsreels, and while people in Detroit or Cleveland might have been excited in 1928 about a game between the Indians and Tigers, neither team was successful and there would have been little reason to capture any footage of them, let alone save it for prosperity. So what you have is not so much a lack of historical footage of great plays, but a lack of historical footage in general. Nowadays a game against two bottom feeders still has a decent chance of being televised nationwide, and even if it doesn't, a single play can land it on any one of a thousand sports recap shows the next day.
The fact that there was no Gold Glove back then is immaterial. There wasn't a Cy Young Award either, yet no one claims that pitching was terrible back then. People cared about defense quite a bit back in those days - there's a reason Rabbit Maranville was elected to the Hall Of Fame despite putting up a batting line of .258/.318/.340, and the double play combination of Joe Tinker, Johnny Evers, and Frank Chance was so well-respected that the phrase "Tinker to Evers to Chance" entered the lexicon of the general public and the trio had a poem written about them. All three of them are in the Hall of Fame, and it's certainly not because of their offense.
Think about how good Ozzie Smith was in the field. Now imagine that the only footage of Ozzie Smith available was from his World Series apperances. Now imagine that the footage was black-and-white and grainy. Seventy-five years from now, would anyone remember how great Ozzie Smith was? No, we'd be talking about how great today's players are and how Ozzie Smith must have been done something right because he's in the Hall Of Fame, but wondering how it was possible since Ozzie couldn't hit water if he fell out of a boat.