Bruh
No it’s not due to marketing.You realize part of those increased budgets are due to marketing, right? Those games typically have more exposure and higher sales potential because in general they are spending a lot more money to put it in front of people. Even some of those indie games we hear about year round, have extremely high marketing budgets.
All that shyt is relative. The bar is raised but everything else is raised with it, if you have microsoft, sony, Nintendo, Annapurna, Digital Devolver, etc. pushing your game you’re already in a different league than other indie developers