God’s morality doesn’t change. If it wasn’t ok in God’s eyes 2000 years ago, why would God change his mind and suddenly say, “that’s ok.”? Why would an infinite being listen to the opinions of finite beings and say, “wow, I was wrong - killing your unborn babies is ok, even though I’ve been saying for thousands of years that you shall not murder. Yeah, I was wrong - unborn babies aren’t really people.”?
Most Catholic’s “study” what God teaches for maybe 15 minutes a week (liturgy of the word & homily during Mass), and maybe read an op-ed in some newspaper or news show by someone who is likewise as lightly educated as them. So, if we study something for 15 minutes a week, are we better inclined to say what divine teaching is than the men who have dedicated their lives to it’s study, contemplation, and sharing? Would you want to take advice from your neighbor about your aches and pains, or perhaps rather see a professional who has dedicated years to education about human physiology and a lifetime to treating it? Oh, and this is assuming that said layperson actually goes weekly to Mass.
Would you let a doctor treat you if their entire medical education was 15 minutes a week? No? So why would anyone take the advice on what morality should be from someone who hasn’t dedicated their professional lives to studying it?
Sorry, rant over.