Can you fool a pike/walleye or even a sturgeon in eating a size 20 fly? I dont think so...
Can a walleye or sturgeon grow to large sizes in a creek you can jump across.
Dont think so...
Iv yet to see a walleye jump higher then me while wading out...while rainbows and the odd brown out of the bow or oldman do it on a regular basis.
You can use 7x tippet on any of those species because they will break you off.
And to finish it off...
http://www.fishinggeeks.net/
I rest my case.