I'm pretty sure most cooks use spices according to their internal feelings on what contexts the spices work well in. Basically the smell test except they have enough experience with the spice already to just do it in their head. Pretty sure this isn't that unusual.
Isn't this just a sign of inexperience? If you have been cooking for a reasonable time, you will know which spices to use when going for what sort of flavour.
Considering the majority of flavours we experience are in fact smells, if you can cook by your nose you're usually pretty safe on how the end result will come out.
I'm not a foodie nor a chef but I've been able to break apart and reproduce restaurant dishes just by smelling.
It's funny that smelling the spices and the food as I cook it to see if they'll go well together is my main method of figuring out which spices to use.
It's the only way to season food. If you're good enough, you can just imagine the flavors, but I still have to rummage the spice cabinet and sniff to get the dish to taste just right.
I cook by vibe mostly because I don't have the items the recipe calls for. So I typically substitute whatever I have that I think fits or smells right. Works well 9/10, just when someone asks me what I used to make something, I have no fucking clue.
According to the label? I just checked most of it (GV, McCormick) has no info whatsoever.
The exceptions are spice mixes (rotisserie chicken, old bay) and a single expired bottle of Durkee celery seed (maybe their other spices are like this, but afaik this is the only one we have).
Best I can do is try different spices when sautéing vegetables.