There are many biblical passages that have multiple meanings or applications. Muzzling the ox that treadeth out the grain is one of them. In many cases, a passage may have both the meaning you think it has and the meaning I think it has. Sometimes, it may have neither!
If you read Psalm 22, you will clearly see many very specific prophecies of th Messiah. And yet it does not specifically label the prophecies as messianic. Even the words, "My God, my God, why hast thou forsaken me?" are the specific words of our Lord on the cross, and yet David's writing does not say so. If you read through the psalm, you will find that David was actually speaking about his own immediate circumstances. And yet many of the verses actually do refer to the Messiah as well. Whether David had any idea of that when he wrote them by the inspiration of God is unclear, at least to me.
But there was an immediate context of David's immediate surroundings, and a Messianic context too, layered together. Having said that, there is also a context for us as contemporary believers. We can see how David (and the Lord) were oppressed, and we can take comfort from the fact that, as David points out, in verses 22 through 24, that God is worthy of praise regardless of our circumstances, and He does hear people who cry unto Him. This is an encouragement to us even today.
Farther on in the chapter, we see a Christian era and/or tribulational and/or millennial prophecy about the spread of God's word among the gentile nations.
Psa 22:27 All the ends of the world shall remember and turn unto the LORD: and all the kindreds of the nations shall worship before thee.
That prophecy is being partially fulfilled nowadays and will probably meet its culmination during the great evangelistic times of the tribulation, when the 144,000 Jewish missionaries will evangelize the world.
There is every reason why we should take scripture literally, at least in context, but that it is also possible to find some "spirituallized" meanings in some passages as well.