> Meaning you fill gas once every few weeks in 5 mins.

Home charging supplies more energy with less cost and effort. It’s physically impossible for ICE cars to win here as I will park at home and stay at home for a while, I don’t need to go to a gas station and then stand around for a few minutes.

> Why are they subsidized then?

Initially it was all about helping the technology become competitive, which it has.

As to why it’s a good idea, ICE cars have negative externalities due to tailpipe emissions. Much like cigarettes burning stuff = public health hazard. Mandatory catalytic converters help, but as I benefit when you buy an EV instead of a ICE car I don’t mind chipping in for some of the cost of an EV.

The alternative of simply taxing ICE engines or gas etc would be equally effective tool, just harder to pass politically.