It’s common to hear the argument that christological interpretations of the OT are at the expense of seeing the pastoral applications. Effectively the argument is, “If it’s all about Jesus then it’s not about us.”
Well… here’s how Paul quotes the OT in Romans 15:3
Christ did not please Himself but, as it is written [in Psalm 69:9]: “The insults of those who insult you have fallen on me.”
Psalm 69:9 is Christ speaking. The One on Whom insults fall is Christ. This is obvious for Paul. It’s not a conclusion he argues towards, it’s a premise he considers to be self-evident so that he can argue from it to other conclusions (i.e. – because Christ is like this, so should you be).
Does this Christ focus detract from the Psalm’s application to us? Paul doesn’t think so. Here’s how he immediately continues.
For everything that was written in the past was written to teach us. (Romans 15:4)
The OT teaches us – not by putting us directly into the shoes of the Psalmist. Christ is the Zealous Insult-Bearer – it’s actually about Him. But it teaches us because it brings us to Him. Then in Him come the applications for us.
But first, this is what we need to be taught – we need to be taught Christ.