A big part of the issue is styling:

I was next to a GMC pickup on my bike the other day at a stoplight. When I stood up, the hood was roughly shoulder-height for me. They can easily make the hood at least a foot shorter (and probably more) and still fit everything under the hood, or even go with a cab-forward design.

But people think those look dorky.

At the extreme end of things, it's hard to argue they are wrong: https://en.wikipedia.org/wiki/Oshkosh_NGDV

The NGDV is dorky as hell. But I bet they're very effective for drivers.

I've got an old cabover passenger van, visibility for me is pretty good, but if you were next to it on a bike, you wouldn't be able to see over the hood cause there isn't one.

It's also pretty dorky, but it's got essentially a porsche engine, which makes it a rear engined mid-life crisis sports car. I have to run it at red line for 30+ seconds to get up to freeway speed...