Losing such high seeds and marquee names is a huge blow to the tournaments, and the actions of the players certainly raise some legitimate questions about their professional obligations to their respective tours, the tournaments and the fans.
Sorry, Peter Bodo (tennis writer), but tough crap. The only time these players really have "off" is late December until the Aussie Open, and even then there are probably tourney's they could/should play in. Asia, which has never really been a "hotbed" of upper level tourneys suddenly has a boatload of them in Oct thru Dec. You can't expect these people to play 24/7. Professional obligations? Sorry, but I just don't see it. I get that every major city wants to have a tourney there because tennis is so popular, but I have zero issue with players pulling out even for very very minor injuries. If they want to fix the system, then schedule less sanctioned tournaments.