Nonsense, F1 needs the shock to the system to actually change. If RB manage to find a way out and stay (which they inevitably will) then it'll just be business as usual for the next however many years. If RB & TR both went, it'd give F1 the serious kick in the shins it needs to actually sort itself out.
Don't you believe it. Losing Red Bull and Toro Rosso would leave F1 in its death throws, with the only question being how many years it would see.
None of it is F1's fault in itself. The market is rather unique (read delicate) at the moment in that it requires a staggering amount of investment to have even a small chance of succeeding, yet a customer throwing money at the situation will likely only have a microscopic chance of paying back to any degree. It's easy to say that four years ago Renault and Ferrari ought to have started throwing their resources at 2014-16, and Honda too, but it clearly wasn't that simple - Ferrari might have clawed their way back to a certain degree, but they are still nearly 200 points behind Mercedes - ab absolute chasm.
We might hope that F1 would be on an equal footing if everyone had the same engine, but the level of integration of the power unit now means that it would be impossible to succeed if you're a customer. Don't think McLaren moved to Honda based on what would happen but on what
might happen, as without them it certainly wouldn't. Despite all of our wagging fingers we don't know better than a multi million/billion dollar team - don't be in any doubt that we'd still be wagging our fingers if they'd stayed with Mercedes too.
It's a manufacturers sport and F1 has never relied on manufacturers as much as it does now. Sure we've had eras of manufacturer dominance, but in the 50s the dominant manufacturer changed each year, in the 60s the key players were mere customers, the late 70s eventually laid the seeds of engine dominance, the 80s were about shifting those powers around, the 90s was back and forth and heralded the re-emergence of the customer plug 'n' play engine and in the 00s we threw that away until the engines were even equalised, BTCC-style. Now we're reliant on huge investment in both the car and engine and the integration of the two and the chance of even a remotely competitive field is microscopic. This is worse than the Ferrari domination of 2002 and 2004 as there's no light at the end of the tunnel yonder.
F1 finds itself in a sorry state, where people don't really care about the mediocre tracks (and that's saying something) where even the divine hope that is the weather isn't garnering any hope. We're now reliant on business and business alone, and if that's not enough to scare you then I don't know what is.