I would agree it is the last way we should understand scripture, but does last mean it is an optional extra, or is it what God has been preparing our hearts to receive? Jesus began his most in depth exposition of the figurative meanings of the OT on the road to Emmaus, Luke 24:27 And beginning with Moses and all the Prophets, he interpreted to them in all the Scriptures the things concerning himself.
Heb 5:11 About this we have much to say, and it is hard to explain, since you have become dull of hearing.
12 For though by this time you ought to be teachers, you need someone to teach you again the basic principles of the oracles of God. You need milk, not solid food,
13 for everyone who lives on milk is unskilled in the word of righteousness, since he is a child.
14 But solid food is for the mature, for those who have their powers of discernment trained by constant practice to distinguish good from evil.
1Cor 2:12 Now we have received not the spirit of the world, but the Spirit who is from God, that we might understand the things freely given us by God.
13 And we impart this in words not taught by human wisdom but taught by the Spirit, interpreting spiritual truths to those who are spiritual.
14 The natural person does not accept the things of the Spirit of God, for they are folly to him, and he is not able to understand them because they are spiritually discerned.
We are supposed to get beyond the plain meaning the natural man or a small child can understand.
That would be funny if it wasn't so... no, it's just funny. TEs here seem to be the one who put the work into understanding what a text meant in the very different context and culture it was written in, and going from there to trying to understand what God is speaking to us in the text. For me, I love trying to get to grip with how writers later in the bible interpreted the earlier text they quote, rather than assuming these people from a very different time and culture understood the same way 21st century literalists do.
Literalists on the other hand proclaim that the great virtue of literalism is it doesn't require any effort whatsoever, the reading is so simple even a child could understand it. Where they do put in the effort is turning texts upside down to make them fit with the science they do accept.