It doesn't bother me one way or another if you use a decoy or not. Its personal choice. I personally very very rarely use one(couldn't tell you the last time I used one for myself) although I keep a small inflatable one in my vest. I'll use one if I'm taking some one new or my daughter or some other youth. It allows them to have a little wiggle room where as if you didn't have one then after the first flinch the bird would bust you.
I've used different decoys in the past but now I have a DSD jake and avain X hen and let me tell you that DSD is unreal at fooling a gobbler. I've never seen anything like it. But I'm not about to carry all that around with me all the time. If you've got an old field bird that's hard headed it may be just what you need to get him to come on over into range
As far as the future of the sport..........the sport is growing thanks to social media, YouTube, tv and forums like this. Its a catch 22 in my opinion. A lot of new hunters learn how to hunt from these arenas and don't have the luxury of having a real mentor or someone to show them the ropes and teach them the right way to go about things nor taught respect. Not saying you can't learn from tv or the internet but you'll be highly disappointed if you think its going to be like you see it on the screen. So if a person thinks they need a popup blind 3 decoys and whatever else they think and they are willing to lug it all into a spot go ahead, they will slowly realize that its not necessary. On a plus though if they have all that stuff there isn't enough daylight in the day for them to get to where I like to hunt. Just my $.02