bokashi is fermenting your compostable wastes, without air, with addition of special starter microbes.
You can just bury your scraps in the garden. There's no particular problem with that other than the critter issue. I have cats, raccoons, possums, woodchucks, squirrel, not to mention mice, shrews, voles etc, in my urban garden. The squirrels aren't too interested in kitchen scraps, but most of all the rest of them would be glad to dig my scraps back up for me and spread them around the yard.
To me there's also a kind of gross factor. You would want to mark where you buried them, so you don't accidentally dig them back up yourself while planting, weeding etc. Half composted stuff isn't pretty. And you need to keep finding new places to bury stuff, so the earlier ones can be left alone to break down.
For me with a smallish garden and a lot of kitchen wastes, it wouldn't be very workable. If your ratio is reversed, maybe so, but it still seems easier just to make a pile and throw stuff on your pile.