Ahh I'm with you know.
I think it's horses for courses. From what I have read the driving force behind military modelling is realism. Military modellers often go to great lengths to ensure authenticity of what they are modelling (I'd be too lazy for that) and in competitions that is part of what they are judged on.
I believe good sci fi modelling requires a high degree of
plausibility (the closest thing to realism in a fictional setting), but only following a good dose of coolness factor. Yes, that gun is far too big for the tank it's mounted on,
but doesn't it look awesome?Scenery for wargaming by its very nature is much simpler than for a diorama. For example dioramas don't need space for 25mm bases to fit! While I wholeheartedly support the concept of highly detailed wargaming terrain, ultimately I don't think anybody has the time or effort to produce it. Try to visualise the amount of research, modelling, building and rebuilding, and money that went into this diorama - that was for a piece around 850x350mm in size. Now imagine having to do that for a standard 6'x4' wargaming table. I just did the sums and it's about 7.5 times the area!
I think the ridiculousness of a Space Marine in the above diorama would be due simply to the heroic proportions of the mini itself. A proper 1:35 (or is the diorama 1:48?) scale marine painted and weathered properly could look right at home if other appropriate sci fi elements were introduced.
Personally I'm sure the plausibility in my (90% WIP) diorama/vignette work is pretty poor, but it's something I hope to work on. It seems that plausibility is brought about by an extreme level of detail, which was something I was trying to create with those Tau pouches and gear I made.
Oh yeah I can make that....