That may be accurate to say after your religion flip-flopped on the issue...But clearly in the earlier days, your religion did not take your position, according to your popes...
Some mistake adumbration and explication for change. Some being taught by teachers who do whatever they can to paint the Church in the worst possible light, become wedded to the thrill of looking down on the Church and her teachings. As the Church explores and refines what she says, these people claim that she is flip-flopping, only because she doesn't say what their teachers assured them (a)she did say; and (b) gave them reason, they thought, to despise her.
I understand how frustrating it is to get a good hate on and then find that what one thought was a good reason was a misunderstanding. The first thing one has to learn IF one is going to play the "What is Catholic Teaching anyway?" game is to move circumspectly, deliberately, and carefully. One's failure to do so does not justify saying the Church changed her view.
What is correct, however, is that the emphasis and stresses change. On another thread a Catholic whom I would describe as a rigorist says I am too squishy. If his side got a hold of the printing presses, one would get a mistaken idea of what we teach and think (IMHO, In HIS HO I am giving a mistaken view. I am confident, though, in having recourse to the already oft-cited passages from the Catechism and from Vatican II)I can see how it seems that the position has changed. But I don't think it has.