The Model 3 has around half a ton worth of battery and weights around 2 tons. the GMC Hummer EV weights over 9,000 pounds, around 4.5 tons, which is roughly three times the weight of a Honda Civic. The hummer has around 1.4 tons in just battery (https://www.cnn.com/2021/06/07/business/electric-vehicles-we...)

The law in my country has a combined maximum weight limit (car + trailer) as part of their driving license, which has cause a bit of a problem with EVs. The extra weight from battery mean that there isn't much room to drive the car with a trailer, a problem which political is starting to gain some traction. The argument being put forth is that people are forced to use ICE car to pull things like boat trailer just because the law was designed for more lighter ICE cars.

If there is no additional weight with EVs then the law doesn't need to change. Are you saying that the people arguing that EV is being hindered are wrong?

Just as a small hint about that. EU has recently change their rules. The previous allowed max was 3.5 tons, but electric and gas powered cars has been given an exception to increase the max to 4.25 tons in acknowledgement that those cars tend to be heavier, and that the previous limit restricted the use of lower emission transportation. Source: Revision of the Directive on Driving Licences.

Of course politicians could be wrong and there is nothing to make it physical impossible to build a light weight EV. Restricting weight reduces road maintenance and decreases the breaking distance and if there is no need for increasing the maximum then everyone is better off with the old maximum.