That bed looks like it might not have been finished and sealed properly, he's definitely not using the green-hued pretreated wood. It'll probably rot by the end of the season.
I have a cedar raised garden I built 4 years ago. It rains 10 months out of the year here and it's still going strong. No indication of any rot or breaking down.
But your comment is important and shows the power of the internet though. If you went to build a garden, you wouldn't just run out and buy pressure treated wood because you know it lasts more. I'm sure you would take the time to research it at least a little bit on the internet. You'd find this out within the first 10 minutes and then go build yourself a great bed.
It's just wood.
I wouldn't eat things out of a bed made with pressure treated lumber.
A fiction writer, and a fictional character voices it, but seriously, fuck specialization. Sure I'm only a "master" of a couple domains, but familiarity (to the point of competence) in others gives me insight and ideas on how to further my work in my primary and secondary fields of interest/employment.
That doesn't mean you should be a mono-skilled person with only a bimodal work/consume life.
To be a rounded individual, you need to pick up skills in a lot of different fields, to the point of not being afraid of them. AT the very least, you'll be able to converse to a wide variety of people without feeling like a dumb schmuck.