In disc golf and elsewhere, 'professional' is strongly associated with high skill level and success in a particular field (as well as informal codes of behavior related to one's earnestness in pursuit of that field), but the word only means that a person chooses to engage in that field for money - as a paid vocation. This is why 'professionals' cannot be true purists or true sportsmen.
'Open' is related to competition divisions. 'Open' basically means 'all comers' - anyone may play in the open division, regardless of sex, age, or skill level or other qualities that may allow a player to qualify in other divisions. An 'open player' is one who has chosen to compete in that division and this division generally has the top competitors.
A paradox arises concerning 'professionals' and 'professionalism'. Because of their high profile in a particular field, the 'public' takes many of their behavioral cues about 'sportsmanship' and 'the spirit of the game' from professionals, but a professional's goal of earning money is frequently in direct opposition of the values of 'sportsmanship'.
'Open' is related to competition divisions. 'Open' basically means 'all comers' - anyone may play in the open division, regardless of sex, age, or skill level or other qualities that may allow a player to qualify in other divisions. An 'open player' is one who has chosen to compete in that division and this division generally has the top competitors.
A paradox arises concerning 'professionals' and 'professionalism'. Because of their high profile in a particular field, the 'public' takes many of their behavioral cues about 'sportsmanship' and 'the spirit of the game' from professionals, but a professional's goal of earning money is frequently in direct opposition of the values of 'sportsmanship'.