Yes, you should be able to delete the other post. To be helpful, here is some info:
Home court is a huge advantage in the NBA. You could cite many things, including energy from fan support being more tangible and motivating than in other sports (due to smaller enclosed buildings compared to football and baseball). Familiarity and comfortability always help, and travel is a big factor in the NBA, where players fly cross-country multiple days in a row. The constant time zone switching, irregular sleep schedules, and tiredness from playing back-to-backs while traveling all hurt road teams in big ways.
04-05 NBA Standings
You have to be pretty bad not to win games at home. Last year, only 6 teams out of 30 had losing records at home. The other 80% all won. This year will probably look similar, with 5 losers and 1 tie so far.
Covering ATS is a whole 'nother story, obviously, since it would be too easy if it were not. Short answer is some teams are good home teams ATS, some are not. Gotta do your research, can't just pick home teams. Even home dogs, which many people love, are only average overall. Last year, home dogs actually lost, failing to cover 4 more times than they covered. Home favs were even.