Humans behaving like ..... humans
Unfortunately, we are products of our own evolution and can only (so far, unfortunately) behave as such. (That's assuming we can agree that evolution happens!) Our 'belief system' includes many irrational things: Fairies at the Bottom of the Garden, 'fate', telepathy, optimism about the future WITHOUT taking any responsibility for it......
There are countless examples of human behaviours that may (or definitely will!) compromise our own futures and those of our children, let alone the more general prospects of Planet Earth. It's like an addiction: we convince ourselves that we can't help <insert name of damaging behaviour> and carry on doing it.
Excessive breeding is the key example, unfortunately. If we could overcome this instinctive behaviour (maybe by the power of rational thought), we'd be some way towards solving other problems, including those from obtaining energy, using it and disposing of the consequences. But stopping population growth, even long term, seems impossible, given the monumental arrogance of the primitive savages that seem to comprise most of the planet's human population.
So we NEED large energy sources - NOW. We clearly can't afford to carry on ripping the guts out of large areas of the Earth just so as to burn the result and then contaminate still further large areas with the resultant waste. Nuclear energy is the ONLY practical short-term solution available. The nuclear waste problem CAN be solved and MUST be. Fusion is a possibility but not any time soon, in quantity. Renewables ARE NOT, in practice and anyway cannot possibly provide the teraWatts of power that are needed.
Get over it.
And, by the way, I resent the comparison between nuclear waste and cancer, based on the assertion that 'remission' implies you HAVE cancer. As someone 'in remission', I can tell you that 'remission' is when the oncologists and surgeons CANNOT TELL whether you have (still) have cancer or not OR that you do indeed have cancer but it won't kill you for a while (and maybe they're trying not to worry you with bad news), OR some intermediate position between the two. Definitely not a valid comparison with anything to do with nuclear energy.