There are all kinds of guided hunts. I've been on a few and enjoyed every minute of them. I am also of the age where a DIY hunt isn't as easy as it once was. Age is creeping up so having a horse to ride in helps immensely. Not interested in owning a horse to use for hunting once every few years. Also find it a benefit to come into camp at night, have a hot, tasty meal ready to eat. A hot shower feels nice as well. It may not be for everyone but I have always felt like I was hunting when with a guide even though he took me to places where he knew elk were present someplace in the area. I've also watched TV programs where the shooter did nothing more that pull the trigger. For me I don't mind using a guide but I still want to hunt. All of my guided hunts have been free-range, on public land. Not a "shoot this one for this much $$$$, and that one will cost $$$." For me it's always been shoot whatever you want, I decided the trophy value.
Have also used a guide I guess on some fishing trips, charters in particular. Those have all been saltwater trips where I'm not going to pull my boat that far but still wanted to fish.
As far a poaching, most of the poaching in African countries is because of foreign markets for some products, or so it seems from the articles I've read. I don't need some ground up horn to be used as an aphrodisiac (perhaps my wife could use some). In this country some poaching is for horns but there is also quite a bit where some idiot just shoots and kills because the animal is there. Shoot and leave.
The trophy value is in the eye of the beholder. Pretty sure humane societies are not the best judge of any hunters style.