I agree with you on this - but you can't blame businesses for doing it, they are just responding to the system.
Perhaps you're right, and standing out from the crowd (making yourself less profitable on the surface but more sustainable in the long term) is very hard to do in a cut-throat capitalist environment. But that's how almost every bank ended up following this crazy selling-on of debt system which allowed the poison to spread throughout the world. Maybe their shareholders would've squealed if profitability had suffered, but maybe they'd be one of the survivors now, buying up their broken competitors at a heavy discount.
The point is that 'I had to do it because everyone else was doing it' is not a defence in law, and it's not a defence I recognise as valid for banks or businesses either. I will accept though that there has been a massive failure of regulation here. However that brings the blame back to the electorate. Who would've voted this decade for politicians who said it's time to stop lending so much... retail sales and jobs must fall, house prices must stabilise or even fall to ensure long term stability of the UK economy.
Virtually nobody, because everyone wants good times to last forever. Which is why things just keep going Wile-E-Coyote-style until everyone realises they've run out of cliff top.
The lesson which everyone ought to learn from this, especially those of you reading this at the start of your working lives (or earlier!) is that all human endeavour is cyclical. No matter how well intentioned the people trying to make systems work, they always fail eventually, because you can't fight the instincts which drive all of us to some degree or other.
Pay attention to the cycles and you will have a far easier passage through life than those who ignore it and get the timing wrong. You might get lucky anyway, but you probably won't. That's how the big money gets to be big... by taking it from the little guys.
At least this time the big money got very badly stung as well. In that sense the credit crunch is being financially democratic. Which, ironically, is why it's so dangerous.
Andrew McP... wishing he'd taken all this stuff seriously when he was much younger.