Here I'm going to say "it depends".
Depends on you, where you live, the route, the drivers, your age, etc.
We used to bike to work quite a bit. It's harder now with 2 kids at 2 different locations and their schedules. Plus, I worry a lot more of the "what if?" (What if my husband gets hit by a car.)
Locally, a couple of our friends have been hit by cars while biking. These are guys who bike to work a lot - every day, or a few times a week (at 10-12 miles each way). It only takes once... My husband's coworker was hit by a car and needed shoulder surgery and was down and out for months. He lives down the street so he got rides with husband to work several times. In his case, he was in the bike lane going down a hill, and a woman just turned into the parking lot he was going by and hit him. She wasn't looking, and was kind of panicking.
People are in a hurry these days, and it takes EFFORT to be aware behind the wheel. I do my drive to work every day, the damn car could do it on its own. There are parts where I have to work to pay attention. At the stop sign before the freeway, it's a block or two from a school. I have to stop and look to make sure there's nobody crossing. Because right at the stop sign are a telephone pole and another sign. I'm so used to seeing "vertical things" right there that a person doesn't always register.