No, that doesn't mean you can ignore the resize option in photoshop.
Please, for the love of all things sacred, resize your friggin pictures!! There is NO excuse for having such large picture sizes. The pieces in the picture do NOT need to be larger than lifesize. Seriously.
A MOC picture doesn't need to be larger than 650 px tall. I don't want to scroll up and down to look at a picture of your MOC, and if a picture takes longer than about five seconds to load, I'm simply not looking at it. I don't care how good the MOC is. There is no excuse for such laziness.
Also, the auto-resize function is no excuse for breaking the rules. The rule in the BBC is 640x640. Your 2000x2000px pictures are not only insanely over-done, but also against the rules.
So, to reiterate, resize your friggin pictures!