The color of ash actually matters? Breaking down bro science

i used to laugh when ppl said white ash is clean bud and dark ash is dirty grow but after smoking enough i kinda see why it sticks not saying it’s a perfect test cuz moisture, curing and even rolling can change ash color. but i’ve had harsh black ash joints that gave me headaches vs fluffy white ash that burned smooth. we know flower threads actually helped me separate myth from reality, seeing side by side pics with coa details makes me think it’s not all bro science, just oversimplified.