Capra and Carts

The transport convoy member, [121215|Tyris], needs 8 [241312|Solid Wood] to fix a cart.

This cart can't go anymore! If it keeps going, it'll fall apart before it leaves the forest! Oh no. I must get some [<S>241312|Solid Wood] to fix it!

Do you know where you can find some [<S>241312|Solid Wood] in this forest? I seem to remember seeing you defeat some of those creatures that look like trees. They could probably be used as materials, right? You have to chop them up anyway. Why don't you bring back their remains to use as materials?

This is good wood! Now we can make this cart like new!

Why shouldn't the wood from those tree-looking monsters be used for other things? What would be the problem?