Totally agree with Rona Ching for different statement you have suggested. The core question you have suggested, I believe we can't accurately project every match results, but by choosing matches with high edges according to methodologies, for me e.g. Match day overall distribution, deviations from natural behaviour and profits/odds generated by teams.
also agree that "watching handicap" is never a skill for accuracy, as person setting up the odds only cares where the odds are generating correct overprobability balance so that they gets the edge from bets.
Totally agree with capital management, believe that without correct planning of handling your bets will never let you buffer the fluctuations arose from investment risk.
However, hong kong, for me, will never the ideal place for such career, as it's non commercial, high edge taken by hkjc, and most important of all, people here lack passion, courage and insights, most of them just play around and not serious. Anyway, cheers for all these post.
and hopefully, one day, we can bring this career to platform.