Those shots are like the famous "50-50" antique car restorations: they look great at 50 feet or 50 mph. Close ups are a different matter.
And, it isn't my theory. Your statement about "the best-known modelers" is simply false.
Puh-lease...
I can provide names. John Allen, George Sellios, Bruce Chubb, Lorell Joiner, Frank Ellison and could go on and on with the modelers that people generally consider the top of their field, all used plenty of figures. Even Pele Soeberg who dominates Model Railroader magazine these days and is generally considered at the top of the game of making realistic layouts, uses plenty of them. The smaller they get, the less 'real' they look, but the same can be said for any element of any model.
While I agree that the Chinese figures in this thread would hardly make for a realistic scene and could indeed detract from one, the very idea that any figures doing so is laughable.
Seriously, this figure detracts from this scene? Really?
I have to ask who are these "well-known hyper-realistic modelers" you speak of who won't use figures? Do any of them work with model trains? A great deal of very respected military modelers love/loved figures and use/used to them to great impact, like Shep Payne back in the day.
Here is a commercial figure set. This is 50/50 and would spoil a scene? If you think so, then I'm dying to see the hyper-realistic layout you surely must have (to make such ridiculous statements) that this would ruin with it's presence!