I'm arguing in favor of independence purely on the grounds that England for this and other reasons is a sinking ship economically so Scotland would be much better off heading for the lifeboats.
This makes several assumptions, the least among them that Scotland will implement its own currency and trade deals in a timely fashion.
England is also a sinking ship, economically, because of its broad social programs, low industrial tax base, historic allowances toward widespread immigration without economic skill sets, and closure of industries and manufacturing outside of greater London, with increasing reliance on financial services as a mechanism of keeping the country afloat.
The UK does have a few very favourable circumstances which Scotland is unlikely to get, at least in the short term. It maintains trade deals with a variety of nations around the globe, which is no small thing, deals which Scotland benefits from in the export of natural resources. It has a large financial sector which is used to finance resource exploration, essential to Scotland's development. Finally, Scotland itself has a greater propensity toward unfettered immigration and broad social programs than does England itself - which is fine so long as the oil and gas royalties are pouring in, if it can round out its economy.
Most of the reasons Scotland's Yes movement are promoting are social, or limited economic. They do not speak to the inevitable change in standard of living that will at least temporarily develop from separation from the UK, particularly if they foolishly continue with the line that they'll maintain the Pound Sterling for an indeterminate period of time.
And I think the fears of "chaos" are wildly overblown. Let's save that word for the breakup of Yugoslavia, or the American and Irish revolutions. What makes this worse than the disintegration of Czechoslovakia? Would you even use that word to describe the independence of the Baltic States from the Soviet Union? Seriously, this is going to be a featherbed transition compared to other separations that had far greater potential for being ugly but turned out just fine.
I don't think you realize the degree of economic integration and benefit Scotland currently receives as part of the United Kingdom. The other examples you named were cases where nations detached themselves from politically and economically unstable unions during the collapse of the larger nation. No such upheaval is occurring in the modern United Kingdom. The Scottish independence movement is far more about heartstrings and sentiment than a true cost-benefit analysis.
In terms of a pampered first-world population, the effects of a true separation of Scotland from the UK will indeed be chaos. Particularly on the economic front; the driver of the Scottish economic engine is basically the petroleum industry, and speaking as someone who live sin a place where the government is also virtually entirely dependent on petroleum revenue to run itself as a province, that does not make a good basis for stable governance, particularly if crafted in the midst of separation from a larger country.