I think it's in reference to the rationalizations made in the article. It's perfectly sufficient to have preferences. But the author makes irrational projections about what change might be like to justify his choice.
I think "stick with what you know" can be a sound strategy if you are loss-averse and generally content.
> Have you considered that people have different tastes?
Yes. If he'd tried eating a variety of foods and hated it, I'd say fair enough. But how can you possibly know something like that without having tried it? To just dismiss so much of human experience without even considering it is honestly tragic.
As Proust put it in his somewhat overused but in this case relevant quote "The real voyage of discovery consists, not in seeking new landscapes, but in having new eyes". Understanding the human experience is first and foremost learning introspection, not tasting thousands of different fruits. Everything you can learn about the human experience is probably somewhere in that little valley where the man lives already.
Have you tried Soylent? https://soylent.com/
You still need to eat soylent and chugging it down is unpleasant at best.
How incredibly patronizing.
Have you considered that people have different tastes? Personally, I hate eating; if I could take a pill to replace all my nutrition needs, I would in a heartbeat, even if it costs more than my current dietary expenses.