An interesting idea on Noach's fig saplings

This is an interesting idea I came across some time last year:

In Beresheet Rabbah 36:3 it says:

"Instead "To plant a vineyard"; from where did he acquire it? Rabbi Abba son of Kahana said: "He gathered to him planting vine shoots and saplings of figs, and cuttings of olives"

The grapevine were taken to make wine, and it seems to me pretty obvious that Noach wanted to drown out his sorrows with wine, and knew he would need this ahead of time. But why fig saplings?

Rabbi Yishai Zargeri wrote in his book Bigdei Yesha (בגדי ישע), pp. 67-68 (my translation):

"And it seems to me that the explanation is that we find that Noach prepared sacrifices when he exited the ark, and to light the fire he needed wood, and since all of the trees were soaked with water it wasn't relevant to light the fire from them, and so Noach needed to bring with him trees into the ark.

And it says in the mishna in masechet Tamid (p. 29a) that wood from all the trees were fit for the arrangement to prepare upon them sacrifices, except for wood from the vine and from the olive tree, and if so, then Noach could not have used the grapevine branches that he brought with him, and he needed wood from a different tree, and then it says that though all woods were fit for the arrangement, but the priests were accustomed to assemble the arrangement with wood from these trees: With young branches of the fig tree, and it seems that they were the best in quality for burning, or for some other such reason, and per this we must say that for this reason Noach preferred to bring these trees into the ark to sacrifice upon them his sacrifice when he exited [the ark]."

I'm not sure though why he brought olives. Olivewood isn't allowed as fuel for the altar. Any ideas?