[dust in the wind]

Match the hatch sadly is an outdated concept.
Once you start fishing out of a boat matching the hatch doesn't matter it's just about throwing some flashy colorful thing long enough to catch a few fish. News flash trout are stupid and they have to eat. The more visible a fly is the more fish that will see it the more fish you catch.

To each their own. I'll take me elk hair my soft hackles my natural colored parachutes , fish them when i know they will work and be happy with what i catch.
I don't like catching random trout just cause my fly was in the water. If i don't know what's going on along the river i don't deserve to catch a fish.

What if you accidently catch a mayfly sipping fish when you have an elk hair caddis on? Oh the humanity!

 

[dust in the wind]

I would say you can't honestly say with 100% certainty a fish takes an elk hair caddis as a caddis...