Not fidelity in rate of time. Fidelity in total duration of time.
Just like humans have trouble imagining/seeing large spans of space (hence the necessity of size enlargement), humans also have trouble extrapolating to long spans of time (hence the necessity of using actual collisional evolution simulations, not "guesstimating" based on pictures or animations).
The size enlargement effect makes the "guesstimate" tend to overestimate, and the time duration compression effect makes it tend to underestimate. From the start the whole thing is fundamentally a bad method of "guesstimation," but for some reason people tend to quickly raise the former issue and completely overlook the latter.
Just like humans have trouble imagining/seeing large spans of space (hence the necessity of size enlargement), humans also have trouble extrapolating to long spans of time (hence the necessity of using actual collisional evolution simulations, not "guesstimating" based on pictures or animations).
The size enlargement effect makes the "guesstimate" tend to overestimate, and the time duration compression effect makes it tend to underestimate. From the start the whole thing is fundamentally a bad method of "guesstimation," but for some reason people tend to quickly raise the former issue and completely overlook the latter.