The traditional alternative is to deem subjects on which one cannot gather empirical data "unscientific" subjects on which respectable people should not speak...

There are some distinctions to be made here. Cryonics obviously provides a better chance to see the future after dying than rotting six feet under. Regarding retirement investment, just ask your parents or grandparents. Yet this argument against the necessity of empirical data breaks down at some point. Shaping the Singularity is not on par with having a positive impact on the distant poor. If you claim that predictions and falsifiability are unrelated concepts, that's fine. But to believe some predictions - e.g. a technological Singularity spawned by AGI-seeds capable of superhuman recursive self-improvement - compared to other predictions - e.g. a retirement plan for old age - is not the same.

"I am tempted to say that a doctorate in AI would be negatively useful, but I am not one to hold someone's reckless youth against them - just because you acquired a doctorate in AI doesn't mean you should be permanently disqualified." Eliezer Yudkowsky, So You Want To Be A Seed AI Programmer

How should I interpret the above quote? If someone has to be able to follow the advanced arguments on Less Wrong to understand that an advanced education is disadvantageous yet necessary to understand this in the first place, how does Less Wrong help in deciding what to do? This is just an example of what I experience regarding Less Wrong. I'm unable to follow much of Less Wrong yet I'm told that it can help me decide what to do.

The basic problem here is that the necessary education to follow Less Wrong will not only teach me to be wary of the arguments on Less Wrong but will also preclude me to act on the suggestions. How so? The main consensus here seems to be Cryonics and the dangers of AGI research. If it isn't, then at least the top rationalist on Less Wrong isn't as rational as suggested which undermines the whole intention of the original post. So I'll right now assume that those two conclusions are the most important you can arrive at by learning from Less Wrong. Consequentially this means that someone like me should care to earn enough money to support friendly AI research and to buy a Cryonics contract. But this is directly opposed to what I would have to do to to arrive at those conclusions and be reasonable sure about their correctness. Amongst other things I would have to study which would not allow me to earn enough money for many years.