I understand that say, for the clarinet, tin whistle, or flute, there are several different fingerings for the same note. These can still produce marginally different tones, which are more or less in tune depending on how it is played ( brought slightly more sharp with a stronger attack, etc ) .
 Are theses really more or less just discovered and used due to them potentially being more convenient for the specific tune, fingering sequence, or preference of the performer? I know for example, when I played the Clarinet, I found it easier to play an upper register note with several lever depresses than with all fingers down, but I always felt this was 'cheating'. If my assumption that they are used just depending on convenience, than that would not be true.
To maybe complete this thought,  is there always ( possibly multiple ) a 'right way' and a 'wrong' way to play notes?
Thank you for any discussion about this matter,