That paragraph was meant to be less intuitive and more “wait if you really follow this line of thought it takes you to some nonsensical arenas...”
But we don’t get to say “I’d like to exchange a fractional share of Microsoft for a widget.” You can only exchange a fractional share of Microsoft for A) cash or B) shares in something else, and you can only do so if someone else is willing to make the trade. There are situations in which you could have an asset you want to sell and nobody wants to buy it, which is also true for other assets like houses (and, if you own a business, whatever your business produces [and, if you are a worker with specific skills, the value those skills could bring to an employer]).
As to your last point, there’s a non-trivial reason why some people suggest stockpiling a year’s worth of food...
That paragraph was meant to be less intuitive and more “wait if you really follow this line of thought it takes you to some nonsensical arenas...”
But we don’t get to say “I’d like to exchange a fractional share of Microsoft for a widget.” You can only exchange a fractional share of Microsoft for A) cash or B) shares in something else, and you can only do so if someone else is willing to make the trade. There are situations in which you could have an asset you want to sell and nobody wants to buy it, which is also true for other assets like houses (and, if you own a business, whatever your business produces [and, if you are a worker with specific skills, the value those skills could bring to an employer]).
As to your last point, there’s a non-trivial reason why some people suggest stockpiling a year’s worth of food...