Sometimes misunderstood
I spend a lot of time researching things. I will also point out where things deviate from the prototype. I occasionally get heat for this.
My approach is that being a model, it will never be 100% accurate. My models aren't 100% accurate. Far from it. But I feel that you should know and understand what the prototype does and did so you will know what corners you are cutting. My feeling is that if you are going to take the time to do something special, it takes the same amount of time to do something closer to prototype as it does to do something unprototypical. It doesn't hurt to know what the prototype did, even if you don't have the space or time or skills to do it now, you can capture the essence, use the time you do have or learn the skills you need. I enjoy growing in the hobby. I see it as a challenge to myself (not a competition with others). If I don't challenge myself to do better, to have better details, more accurate cars, better quality craftsmanship, then I'm not satisfied.
I am in the process of designing a new layout. I will have to leave out a whole bunch of stuff that the prototype had. But I know what I am leaving out, I know what I am keeping, I know a lot about how the various parts worked together, and I know what I need to add to make the parts I have work together.
I have access to a lot of information through experience and a lot of research. If somebody has a question, I have no problem sharing what I've learned. If you're stupid enough to ask, I'm stupid enough to answer.
Since I have a lot of experience I will also tell people if stuff doesn't look like its going to work. If you have a switchback with a two car tail serving a 15 spot track, I'll tell you the switchback is a problem, because it is. If other people think that's mean, tough, I would rather have the person knowingly make a decision to incorporate that, understanding the risks, than to rubber stamp a "Great plan, looks like fun!" reply. Most of my comments aren't opinion, they are geometry and engineering. If we didn't have 'rivet counters" we would still have generic cars. It is because of the rivet counters that we have the variety of cars that we have and the detail on those cars.
Obviously others don't feel this way. The "do what you want" crowd can be just as harsh and just as counter productive as the people who are rigid "rivet counters". My feeling is that if the person offering the opinion or commentary points out a deviation from prototype and offers a suggestion to correct, improve or to mitigate the deviation then they are offering constructive criticism.