Substitutions

Hello,

I went to by some strawberry rhubarb at the market. I found rhubarb and asked if it was strawberry rhubarb. The associate said he didn't know what variety rhubarb it was, but pointed me to strawberries. That didn't make much sense because strawberries will overpower anything you combine them with. But the recipe I had noted that while strawberry rhubarb makes the best pie, you can use any variety. So I bought what they had and the pie was great!! Do people really use rhubarb as filler in strawberry pie, and if so, why waste the rhubarb?

Thanks for your input,
Bill