I think you’re doing a fine job of explaining why you feel the way you feel. I think where it becomes impossible is if any of us tell others how they should feel. We all play and enjoy the game in slightly different ways so it’s no surprise that balance changes (including cost or time) impact us all differently.
I agree with you time is the main resource in the game, which is why I think time reductions make more sense than cost reductions. If SC wants to help out newer players to catch up and/or encourage new players to start playing, time reductions are what do that. Cost reductions help inactive players, so I get why active players are irritated by them.

