it is absolutely not good, but pretending to play a super high action density engine on most boards for some reason looks skillful to a lot of people.
It's a curve.
In the early game, you're happy to have one or two Silvers to help you hit $5.
In the middle game, you're struggling to connect pieces together and wanting to shuffle as often as possible, so the Silvers start to get in the way.
In the late game, when you're greening pretty badly, you don't want to shuffle as often and Silver is a helpful card again.
One of the beautiful aspects of Dominion for me is this curve which goes from crappy deck to smooth engine deck to crappy green deck again.
One of the hardest parts is finding the right moment to pull the trigger to throw in everything but the kitchen sink to get over half the VPs or stay ahead so you can end the game.