It says on the information page: Space Age includes its own means of automating wood production. Specifically, the agricultural tower unlocked on Gleba.
Also, in Space Age, there isn't much call to actually automate wood - unlike in Freight Forwarding for Factorio 1.1 which does have a (albeit quite niche) reason to automate wood.
I don't really want to bypass Wube's Space Age design and give a much easier recipe without a good reason. If someone else wants to, they can. This mod is open source and pretty simple internally.
If an overhaul for Space Age comes along that I play (or is popular enough for people to ask for this mod to support it) which has a need for early/easier wood automation I could reconsider.
