I have come to the conclusion that if you want a powerful electric bike with lots of range which equates to a heavier battery, spokes and wheels that don't break, a strong frame etc. It has to have some heft to it. The bike I own had a few issues with light parts and had to be upgraded to heavier stuff.
The components that can withstand the stress are going to weigh a substantial amount unless they are exotic (expensive) material. If bike makers could get away with less aluminum etc it would increase their profit margin. Would I like to have a light electric bike that would hold together? Without a doubt but then I am sure I couldn't afford it either so will live with the heft as best I can..
I have a Cruiser coming in May, well maybe.... Not holding my breath.