There is much more to it than is being discussed here.
There are no hard fast rules. I have had deer walk right up to me while wearing a ghillie suit, I have also had them walk right past me while I was leaning against a tree with blue jeans and a tan short sleeve.
Movement they will catch. Scent they will catch. The rest. . well it absolutely . . depends.
Part of what is happening with a lot of folks is the ideal that they don't need to do all those things, a technical rebellion if you will.
I don't want to have to purchase a $1,500 bow, I don't need $120/dz arrow shafts and $30 a pop broadheads. I don't need fart proof clothing, or magnetic aura proof clothing or all of that.
A Fred Bear hat, a plaid shirt, a pair of soft pants and let me have my time in the woods.
I also don't NEED to kill something. Oh I want to. . . really. But if I don't get the opportunity I'm not gonna cry.
I'm also not gonna have to run out and buy more technology so I can get closer no matter the wind and shoot farther to reach out so that big one can't get away, etc etc.
There is a line in the sand that each of us draws. Each does this based upon their needs, their wants, and some peer pressure, but all these things at THAT time. THAT time changes all the time with new experiences, with age, with increased skills or abilities.
Yeah.. camo works. Yeah Ghillies REALLY work (for now). Those new (not) mirror blinds that reflect what is around you will probably work. A well tuned compound with pins out to 80 yards will work, as will a scoped .270.
In the end. . . you will decide what is right for you, and what is enough.
ChuckC