can it really? the abilities of TLAs is unknown, but RSA with a properly sized key isn't known to have many weaknesses. that doesn't mean there aren't any sidechannel attacks but your average thief isn't going to be able to break into an encrypted hard drive on any reasonable amount of time, even if they have physical possession of the device. Or so I'm lead to believe. if you have evidence to the contrary, I'd love to hear!
The odds of someone stealing your computer to hack into your accounts instead of simply selling it on eBay are practically zero for most people.