Hardly, the EV adoption rate in the US is pretty poor and even if we ignore that, the share of EVs among existing vehicles on the road is way to small to be the dominating factor for the increase in weight. That said, yes, EVs will lead to an increase in weight, a necessary evil. However, that can be compensated by downscaling vehicles to actual needs. People are currently buying cars far larger than what they actually need for partly irrational and partly egoistic reasons (increasing threats to life and well being towards others in the hope to slightly decrease it towards oneself).