Not sure why it is misleading mate. To put it simply, more deadlift equates to a blank that will take more abuse, high-sticking, knocks and add to that the ability to handle more drag to turn stubborn fish. Deadlift is just one part of the equation but it is critical in real-world situations.
If you have a 2 blanks, same dimensions but one can lift 15kg max and the other 45kg max...on long hard fight with a big fish, the 15kg test blank will probably have a greater chance of failing due to delamination and other factors. The 15kg blank will be more of a "finesse" blank. Just compare Wei World vs Sevenseas Imperial...both rods used to land big fish but there are many reports of Wei World failures in Taiwan...of course the Imperial is a much heavier rod, so the challenge is to design a lightweight rod which can take a lot of abuse (deadlift).
Position of pivot points are are another piece of the puzzle and play a part in determining the load ratios. Then you have to add taper etc...
cheers