It wouldn't necessarily be deceptive. It could be that God wasn't concerned about having science's dating techniques be accurate.
I don't think I'd even call it sciences dating techniques, so much as I'd call it observation of the naked eye.
For example:
If you saw this image in deep space, would you guess that God made it as is, instantaneously, in it's form as presently viewed?
Or would you think that maybe it has been traveling in a particular direction over some period of time?
You would probably guess that it has been traveling for some period of time just because of the logical consideration that there's a trail behind it.
Another example. Would we presume that some time has passed in the image above for the individual to make footprints? We might guess that it would take more than a couple seconds to make such a trail, based on what we know about the physics of physical matter.
Or at least what we think we know about how physics works.
And then in some cases we have galaxies that appear to have already run into each other, pulling one another apart and leaving a trail behind, such as with the image of the tadpole Galaxy above, or galaxies leaving trails behind them as they move through space.
They give the appearance of having moved and continuing to move, as if they weren't just created yesterday but rather appear to have been around for some period of time.
And so if the tail of a galaxy is 280,000 light years long, even if physical matter moved at the speed of light, It would be hard to imagine how something could travel 280,000 light years in 6,000 years.
And so rather than it being a typical dating technique, it's more about a matter of appearance. Similar to the idea that Adam and Eve would have been instantly created as adults. Which is why I think about this hypothetical idea of traveling back in time and meeting Adam and Eve and saying " hey Adam, where did you get that scar? Maybe Adam has a scar on his leg or something, and rather than it being a matter of a historical event unfolding, Adam says that he was simply created with his scar as if time had passed though it had not.
And it's not just astronomy that we run into these bizarre thought processes. You would run into the same thing if you studied plate tectonics and geology or if you studied population genetics and rates of genetic change and mutation. And you would find it in lots of subsciences as well, things like molecular clock studies or if you're looking at the petrology behind things like regional metamorphosis or ductile vs brittle deformation of structural geologic features etc.
This isn't just a one-off, maybe the scientists got it wrong this time, it's a prevalent brick wall that is run into by dozens of independent fields of science.
And it leads to some really bizarre thoughts when you really get into the scientific weeds.
So, I just don't think this is a matter of scientists dropping ball. I would say that, either God has deceived us, or maybe Satan has deceived us by altering existence in some sort of time warp illusion that by all accounts, by every measurement and every test, appears to be real...
Or somebody messed up with their interpretation of scripture. Which I think, personally I find a bit more feasible.