What are you considering wilder?
In the first photo, everything is spot on except for the pants. Would have just been jeans in my neck of the woods.
In the second photo, the guy on the left is stuck in the 60s. There were some guys like that, but the 70s were more about being casual. He looks too formal, and his 60s haircut is too clean-cut. Definitely possible for the 70s, but not the most common look. I did have a leather jacket that looked a lot like that one, but I usually wore it with jeans.
In the third photo, the only thing that seems off to me is that it all looks too new. Should have been well-worn. You were supposed to look casual and comfy, not new and stiff. Could have recently bought the outfit though, so it’s not out of the realm of possibility for back then.
4th photo is spot on. I had a similar shirt back then.
5th photo also spot on.
6th photo the guy is wearing blue with brown. The shirt looks off to me too. Nobody I knew wore a shirt like that. The girl’s shirt looks off to me, too. Shouldn’t be so square at the waist, should hang down more and maybe have some frills at the bottom and on the sleeves.
7th photo if you were just wearing a plain T-shirt back then you were usually just being casual, and it was usually an old T-shirt. A nice new T-shirt seems a bit off. Again, not completely unrealistic since he could have just bought some new T-shirts, but not the most common look.
8th photo the guy in the middle looks out of the 60s. The guy in the right is also definitely out of style. If the guy works for some very conservative company (or the FBI or something) then sure, as those guys were typically still wearing 60s style suits. More fashionable guys were wearing more earth-toned suits.
Overall, hairstyles are spot on.
My take on it is that while some of them weren’t the most common looks back then, and everything needs to look a lot more worn and abused, but otherwise nothing is really out of place for the time period.