I like to say that I don't care if it's inaccurate, as long as it's precise.
FYI, precision is an entirely unrelated to accuracy, whether consistent or not.
Precision is basically just how many decimals your measurements have.
Trend lines are way more important for pretty much everyone. Anyone who cares about absolute numbers is either focusing on the wrong thing, or is doing vo2 max tests on the regular and knows the numbers on their watch are trends anyway