Actually, if you believe economics hasn't changed since the 18th century you really should read it. Who knows, maybe you'll even reevaluate your understanding of economics.

That'd be nice on an island. Otherwise, have fun competing against technology behemoths from other nations, some receiving subsidization from the government.

In most of these cases, they've sold something for billions to a single entity that has the money and doesn't strictly need it (for example, if Youtube had not sold to Google it would have been an existential crisis for Youtube, not for Google).

When you save 10 lives and charge billions you are a criminal.

In these ten sales, you've made billions by charging each of the individuals 1/10th of the billions, individuals who don't have the money and do strictly need it.

There's a difference between "sells for billions" and "charges billions": in the former in the case of photo sharing apps, it's a buyer's market, and in the later it's a seller's market.

The founders, the sellers, might get praised in the event of a billion dollar photo sharing app sale, but few have sympathy for the purchasing party in that transaction, no matter what they paid, because it's a buyer's market.

I'm not sure fair, to the drug makers or otherwise, enters into it. These are not really that comparable, and only appear to be due to the scale of the sales both being "billions".