Wasting Product on Transitioning Hair?

I will have come up on my first year anniversary for transitioning in November. I recently received the "Curls" sample package to see if I like it as I am trying to find the product that works for my hair. However, I was talking to a woman today who was natural herself that owned a beauty supply store. She said that in a sense I am wasting product and won't get the full effects of products in general until I cut off my relaxed ends. Is this true? I mean whenever I try anything new I pay attention to my natural hair to see how it likes it and usually my relaxed ends like it too. I am so confused
Last relaxer: Nov. 24, 2008
BC: December 19, 2009
Products: Whatever works!
BC: December 19, 2009
Products: Whatever works!
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Started Transition: March 2008
Ended Transition: March 2010
Transitioned for: 2 years
4b natural
PW: justme
BC: December 19, 2009
Products: Whatever works!