Steve - That just about sums it up. Two camps with a different fundamental views.

I can appreciate Jack Campin's argument that music is written for Bass Clarinet "using bass clef but written an octave higher than it sounds", and that is what the recorder world play, so if you want to be part of the recorder world, you should take the time and effort to learn to do it that way.

I can also appreciate that someone may not have time to completely re-learn fingerings, let alone reading music in a new clef, when all that is needed is a way of producing the same note as the rest of the band.

My personal view is that ANY written music is simply a shorthand which allows you to play the same as another player. Lute players used Tablature which told them where to position fingers on strings - much more sensible than linear dots for a multi-stringed instrument. I know some people here on Mudcat can speed read from ABC notation. It doesn't matter what notation system you use as long as you can produce the correct notes.

I learned to read music in brass bands, where an E flat horn happily plays along with a B flat cornet. The written music is pre-transposed, so each instrument plays from sheet music with a different number of sharps or flats. The note that is actually played by either instrument is not the note that would come out if played on a piano, but it doesn't matter, as the band is a self-contained entity.
The recorder world do not do it that way, but it works! The intervals between a C and an F recorder are the same distance apart as a B flat and E flat brass band instrument, so music written for brass would work on recorders if the players used C recorder fingering.

I agree with Jack, (although using my own description) that learning to play an instrument "by the book" allows you to play what is "in the book", and as such can open out your options.
I also understand that, for a limited "fun" repertoire, a quick fix that allows you to get the correct "sound" from the instrument may be all you actually require, but means that you cannot play music which hasn't been deliberately arranged for you, and as such can limit your options.

At the end of the day, there are many ways to skin a cat - Actually I've never skinned one, so there may only be one...

Quack!
GtD.