So, um, what's the problem, then?
There are no problems. UFAI could be constructed by a few people who know what they are doing on today's commodity hardware with only a few years effort.
The outside view on this is that such predictions have been made since the start of A(G)I 50 or 60 years ago, and it's never panned out. What are the inside-view reasons to believe that this time it will? I've only looked through the table of contents of the Goertzel book -- is it more than a detailed survey of AGI work to date and speculations about the future, or are he and his co-workers really onto something?
As per a recent comment this thread is meant to voice contrarian opinions, that is anything this community tends not to agree with. Thus I ask you to post your contrarian views and upvote anything you do not agree with based on personal beliefs. Spam and trolling still needs to be downvoted.