to your last point, top companies hire before PhDs even defend all the time. In fact it's nice when that happens because then you can go to your committee with the job offer and they will pass you without too much fuss or revisions, sometimes a year early. Post docs are pretty optional in the industry these days, and the prerequisites on job applications for phd science positions are going to be a bit fast and loose.

The trick is to angle your skillset to the industry skill set, network network network, even collaborations with the company directly can happen when you are a grad student. When you show up to the interview and are recommended by the people you networked with and understand their technology since you've been all over it in grad school and have some papers published to prove it, suddenly you are the top candidate in the pile. It's not impossible to do this if you angle your grad career from the start, and go to a school in an area with a lot of these companies and other good research schools nearby.