It's not strictly wrong. This has been stated before, but we'll say it again: at different levels, the game just looks different. Bronze is team deathmatch, where everyone kills everyone until the death timers are so long that there's nothing to do after a team fight but take a tower. Silvers are more objective focused, but often pick team with no siege ability, or execute their sieges improperly and fail to actually get inner/inhib towers. Splitpushing is commonly attempted at the worst possible times by champions with only moderate threat to towers, etc. Win conditions therefore revolve around the power boost provided by dragon stacking or baron, and the game often turns into king of the hill. This is reinforced by a lack of trading objectives and player reliability. What's more, your average silver team has at least two players chomping at the bit to fight whoever, whenever, for any reason, and everyone knows everyone tracks dragon timers now, and the drake is usually taken within a minute of spawn. ergo, these four players will always be there, and their teams wont abandom them, etc. It's self-causing really.
Side note, why is 3rd drake considered so bad? While in a fight the move speed feels small, it feels big when it comes to rotations and longer term positioning. I've seen a few games won and lost mostly based on that speed boost.