As another anon said, some places require you to have a guide if you aren't a resident. And even if they don't, there's nothing wrong with having a guide.
However, I do not like modern hunting culture at all. Too many hunters simply have no idea how to hunt. They go and blow hundreds of dollars on gadgets and deer piss just to sit in front of a feeder and wait for Bambi to walk up so they can blast her.
I'm so thankful that my father and grandfather taught me how to actually hunt. Reading the wind, stalking, learning how to find game trails and use the terrain, tracking, etc. The only time we would hunt out of a tree would be one we climbed ourselves and knew that game would be passing along through on the trail.
Guides are just a tool, like your rifle or knife. They can help show you the local terrain, tell you about the signs you should be looking for, etc. I have more respect for people who use guides than people who sit in deer blinds and call themselves expert hunters.
I do have a problem with people going on guided hunts within fenced in areas and shit like that. It takes all the sport out of it. Go ahead and do it if you just want some tasty venison, but don't try and show me the "trophy" you got out of it. Same way with big game hunters in Africa. I understand that most of the tags given out for those are for old bulls that aren't breeding anymore and need to be culled, but don't try bragging to me about how "you" took a trophy lion when in reality some starving African villager did all the leg-work.
>tl;dr
Guides are a useful tool, and sometimes required by law. There's nothing wrong with using them, but there IS something wrong with allowing them to do all the work.