I’m not telling you whether or not to trust them, but I don’t mainly due to contradictions with the Bible and secondarily all of recorded human history. Science is famous for the consensus / group think that defies all known logic and common sense. Here’s the intro to the article I’ve been quoting at creation.com/age-of-the-earth:
No scientific method can prove the age of the earth and the universe, and that includes the ones we have listed here. Although age indicators are called “clocks” they aren’t, because all ages result from calculations that necessarily involve making assumptions about the past. Always the starting time of the “clock” has to be assumed as well as the way in which the speed of the clock has varied over time. Further, it has to be assumed that the clock was never disturbed.
There is no independent natural clock against which those assumptions can be tested. For example, the amount of cratering on the moon, based on currently observed cratering rates, would suggest that the moon is quite old. However, to draw this conclusion we have to assume that the rate of cratering has been the same in the past as it is now. And there are now good reasons for thinking that it might have been quite intense in the past, in which case the craters do not indicate an old age at all.
Ages of millions of years are all calculated by assuming the rates of change of processes in the past were the same as we observe today—called the principle of uniformitarianism. If the age calculated from such assumptions disagrees with what they think the age should be, they conclude that their assumptions did not apply in this case, and adjust them accordingly. If the calculated result gives an acceptable age, the investigators publish it.
Creationists don't appear to have any problem assuming that a "day" in the past is the same 24 hours we have now. That 24 hours is always measured by the rate of change of some process. You appear to want to restrict the luxury of assuming constants to being your exclusive domain.