The Sierra is a very large mountain range - some places have tons of downed wood for fires and during many times, fire danger is low. There are regulations of where and when campfires are allowed. Between obeying the regulations and using good judgment I see no problem with campfires if done properly. As for the work involved, it depends on what you feel is work. For people who really enjoy a campfire, the "work" does not really seem like work. It is an enjoyable activity. Some folks hate the smell of smoke; for others it is a sweet smell with reminders of good times. If you do not like campfires, fine. But I do resent the "holier than thou" attitude that your way is the only way and the belief that all campfires are environmentally bad.