If you don't have the required knowledge just pay a little bit to a "Bitcoin bank" that handles the task for you. In the real world you also don't carry your money with you all the time, but store it on a bank.

- Centralized money is bad! We need to create a perfectly decentralized, distributed economy!

- Oh no! It turns out that the average Joe will get burned really badly by this new decentralized system!

- But wait! What if we created these things called "banks" and provide people peace of mind and security by taking on some of this risk?!

- ...?

- Um... not profit.

- Anonymity/trackability. Gone if you are with a bank. Sure, possible to sidestep by going through the song-and-dance that is withdraw-send-deposit. We can do this IRL also, but there's a reason people do not.

- Taxability. Welp, if your BTCs are in a bank, the IRS can easily get you.

- Abusive/coercisve government action (e.g., freezing). Well, yeah, if you're with a bank that can happen too.

- Lack of fees. If banks become standard (and if BTC takes off, yes, they will become standard) then kiss goodbye to this benefit - the same way cash right now has no transaction fee, but bank transactions do.

In fact, the only major sell of Bitcoin that remains:

- Inability for government to arbitrarily expand the supply of money.

Still a win, but suddenly Bitcoins have lost a lot of charm, especially for the everyman for whom the above 4 points are much more salient than that last one.

In the real world, the banks are subject to regulation.

Why?

It's true that key management and security are not as good as they could be in the official client, but that doesn't mean the project has failed, merely that the client needs to be improved.

Note that no one of the developers expected it to get this big this fast. Six months ago, no one would even bother stealing bitcoins as they were not more than a toy curiousity. Now very serious amounts of money are represented.