Huh? My experience flying Singapore Airlines is very different from eg British Airways or Ryanair.

(As a customer, I only care about stuff that actually affects me. Checking what's written in the contracts and official terms-and-conditions is at best a means to an end; especially since I am unlikely to go out and actually sue anyone. Mostly, I'll just avoid airline X, if I hear that other people are having trouble with them.)

Great: try flying SQ from London to Dublin.

BA is a perfect example - a few years ago it was an OK airline, but it has chased the policies of RyanAir (even hiring their CEO!) to the point where they are a complete shit show.

You’re pretending there is a market where consumers have input where no such thing exists.

Market outcomes don't have to reflect your preferences. People vote with their wallets, and their wallets vote for Ryanair-style flying.