Yup, a lot of the conversation around energy and electricity feels like we're not at all talking about the same things. A book worth reading on the subject: https://www.withouthotair.com/
Also, the 1,000 year figure for fissile fuel does not consider reprocessing which reclaims over 80% of fuel used.
A lot has changed since then - the costs he specifies, for instance, might as well be from the previous century.
Energy use has also decreased.