I had the same thoughts when watching this. Cucumbers either require twine, in which case they grow quite tall), or each plant will take up half that raised bed. Tomatoes are not planted directly from a seed, you first need to grow seedlings, a very laborious process that’s hard to automate. Tomatoes can also get quite tall, with some plants exceeding 5 feet. You don’t need such elaborate setups for irrigation either - this is trivially solved with drip irrigation stuff available at any Home Depot. And so on and so forth. I grew up on a farm and will probably retire on a farm. The most labor intensive part was weeding and pest control. If you want to do something real, automate that, without making any unwarranted assumptions on how the various crops are planted.