Not a counterpoint. I bought a bike trailer and it’s far less useful for transport:

a) tippiness / base size: you cannot take any reasonable sized furniture in it, and absolutely nothing tall or top heavy.

b) lack of cover: you cannot transport anything unless the weather is perfect

c) lack of suspension: cars come with massive cushy suspension systems that prevent things from bouncing and breaking. This is also the main factor that limits biking home with groceries like eggs.

Again, I own a bike trailer, it’s mostly used for taking my hockey equipment to close games, it is not the same thing as a car and once you try and make it match the features of a car, you end up with 30 Rock Microwave / Pontiac Aztec situation.