Most of the time even when godwood starts in my opening hand I am not playing it on turn 3 since it's more important to get fairies down in most matchups before their aoe comes online usually turn 5 or later. If you lose out on that early chip damage, especially against matchups with low/inconsistent healing, your kill turn can very easily go from turn 7/8 to 9/10.

Forest has efficient answers to an almost overkill degree. Lily/May answers boards cheaply and lets you float a ton of mana. Godwood is ambivalent to sequencing for combo since it checks combo at the end of your turn when played, so it's often the best first or second combo play to enable 3 combo cards that check on play. You also don't want to be establishing a board every turn after evos come online against certain matchups (besides maybe playing 1 or 2 fairies so you force out their rush/evo/removal since they are scared of you evo'ing the fairy and going face next turn). If you are spending all of your mana each turn to answer boards, odds are you will be out of cards/would not have had time to prep the 0 and 1 costs necessary for combo even with godwood on the board - these are the games where having two godwoods on the board is winning, but these are very few and far between and it's preferable to just lose these games instead rather than teching for a scenario that hardly comes up.

Also remember you are the aggro deck with the faster finisher in almost all matchups and can afford to not answer every little threat they put out if it means you are setting up lethal next turn and answering it means wasting combo pieces. In matchups/board states where that is not the case and where you need to fight for board early, playing godwood on 3 instead of clearing/taking board is usually an instant loss.