I don't think even the most hard-core FAnatic would argue in favour of gutting the FS of resources. But how does the FA actually require that? So many of the badges are about collecting and producing resources.
Contribute to AWs and get a badge - grows the FS.
Collect coins and get a badge - grows the FS.
Train troops and get a badge - grows the FS.
Craft and/or Use Spells and get a badge - grows the FS.
Craft items in the MA and get a badge - grows the FS.
Produce basic goods and get a badge - grows the FS.
Fight in Spire and Tourney (earning KP, diamonds, CCs, etc) and collect a badge - grows the FS.
Produce various WS productions and get a badge - grows the FS.
You do not have to decimate your city or FS to compete in the FA. You don't need to decimate your supplies of instants. Can you CHOOSE to do so? Sure. Why would you? Because that is a part of the GAME you find fun. If
@Darielle wants to win Ferris wheels so she can get coin rains so that she can help her FS do well in the FA - cool. That's her game, and it brings her joy.
@crackie please disregard this entire post. #TeamWorstofTimes. And I hope
@Ihrlaen doesn't disown me.