To keep 'em on their toes
Because we (more like I) think that there are more important ways of spending your time then slaving away at video game, but the caveat is this: you never had to actually do any of that. You can prioritize what you want. You're also not limited to playing only GT.
You could easily support a company that's making a competitive product that is the same quality or better. Hell, you can switch to a platform that is more consumer friendly than what Sony is providing. To me it looks like an online mass-tantrum about a disappointing release, that's all. Try something new. WRC and ACC were recently on sale. Assetto Corsa with mods is pretty beastly too (if you have a PC).
Individually, you'll have no effect on the market but at least you end up doing something you enjoy and playing a game that "respects your time". Unless you want all the toys at the start?
Go on. Bite.
That's sort of the impression I got from the pricing as well. They're pretty much not worth buying at this point in time and will probably become even more pointless as we get further into the game's life cycle. On the other hand, MTX can provide a
significant amount of money to companies. It would be almost stupid not try to implement them in some form - still needs to be supported by a half-decent game though...
Regardless, I wouldn't put that much trust in any company, they are in the business of making money. I expect every decision they make to help themselves in some way. Grand revelation.
All we can do is speculate on why they make certain decisions, hence why I don't feel that strongly about any of this to begin within. Unless they made a massive blunder in regards to their customers found acceptable, why would PD do something that would hurt their reputation even further?