I'm not clear on the invocation of this statement. The insertion of verse breaks allows one to ignore the continuation of the statement:
"Thus were they called, But they went their own way; They sacrifice to Baalim And offer to carved images."
The "called" then applies to one who sacrificed to idols. How would one understand the "call" in verse 1 to refer to Jesus without taking into account the description of the one called as an idolater?
Yes, if read straight through it would seem to be a problem. And you enumerated the problem quite distinctly!
To understand prophetic utterances, one must understand that one can flow from the natural (what is) to the supernatural (what is to come) much like what John's revelations recorded, "Rev 1:19 Write the things which thou hast seen, and the things which are, and the things which shall be hereafter" - but very hard to discern when what is changed to what is to come.
Let me see if I can give an example.
King David was singing a Psalm and just expressing his heart about the difficulties he was in, but then, in the midst of his prayer he moved into what is to come:
Psalm 22
My God, my God, why hast thou forsaken me? why art thou so far from helping me, and from the words of my roaring?
2 O my God, I cry in the day time, but thou hearest not; and in the night season, and am not silent.
3 But thou art holy, O thou that inhabitest the praises of Israel.
4 Our fathers trusted in thee: they trusted, and thou didst deliver them.
5 They cried unto thee, and were delivered: they trusted in thee, and were not confounded.
6 But I am a worm, and no man; a reproach of men, and despised of the people.
7 All they that see me laugh me to scorn: they shoot out the lip, they shake the head, saying,
8 He trusted on the Lord that he would deliver him: let him deliver him, seeing he delighted in him.
9 But thou art he that took me out of the womb: thou didst make me hope when I was upon my mother's breasts.
10 I was cast upon thee from the womb: thou art my God from my mother's belly.
11 Be not far from me; for trouble is near; for there is none to help.
12 Many bulls have compassed me: strong bulls of Bashan have beset me round.
13 They gaped upon me with their mouths, as a ravening and a roaring lion.
14 I am poured out like water, and all my bones are out of joint: my heart is like wax; it is melted in the midst of my bowels.
15 My strength is dried up like a potsherd; and my tongue cleaveth to my jaws; and thou hast brought me into the dust of death.
16 For dogs have compassed me: the assembly of the wicked have inclosed me:
they pierced my hands and my feet.
17 I may tell all my bones: they look and stare upon me.
18 They part my garments among them, and cast lots upon my vesture.
I picked out three obvious ones (though the whole of the Psalms expressed what Jesus went through.)
We know they didn't cast lots for David's garments but the did for Jesus the Messiah. We know they didn't pierce David's hands and feet but they did do it to Jesus the Messiah.
So, at what point is it "now" for King David and when was it "prophetic" - hard call many times.
In other words, Hosea dealt with both what was and yet still pointed out to Jesus.