The argument right now would likely be that it doesn't show up in the google search for "guitar tuner" and needs "google guitar tuner" to be found coupled with an assumption that this is how it will always be.

It's a fair enough argument. But they should make it in response not just downvote like so many google employees not wishing to engage with a discussion about abuse of market power at all. I think I tend more toward your point of view personally, what is now isn't what will always be in search engine rankings etc, but there it is.

OP does have a point but I think a better example is when google scrapes a truncated paragraph from a website and presents that.

Agree, I take back the specific example of tuner since it doesn't show up searching only for guitar tuner or such terms. But I still stand by other snippets.

You're assuming the downvotes are due to a difference of views, and not because your writing style hasn't found its home yet. It's not that most people disagree with the substance of your commentary - there's a comment with similar argument but with a different tone as yours, currently trending on this post - but that your writing has a natural resonance with the downvote button, similar to singing the perfect note to break a wine glass with sound.