Obsidian would have died without the fictional dead by being bought my Microsoft. Not like Obsidian was swimming in cash (or they wouldn't need to do a kickstarter) for that matter.
In-depended developers only work if the developer can develop a smashing hit to the scale of a Witcher 3 or a GTA 5 (take-two founded Rockstar). Obsidian does not own a mainstream IP that manages to sell well 3 or 4 years after release.
Also your final point is a contradiction. If a developer isn't developing games that do well they will be shut down regardless if they are in-depended or not. At least now they have a chance to develop games and as long as they deliver quality Obsidian does not have to worry about money.