While I do not disagree with your take, much of the same can be said about Enron. If the dotcoms were gone over with a fine tooth comb like Enron, I'm sure you would find quite the same actions and practices. Those however, could not be construed as "oil companies".
Neither could Enron. (Be construed as an oil company.)
Overexuberance and/or bad publicity can't make or break a sound company. Enron was not a sound company for several years.
And your point is???