You seem confused about business. The purpose of business is to make money. The purpose of business is not to engage in expeditions down blind alleys.
It is apparently not in the business interest of Shell to poke around under rocks and pour money down rat holes. In another post I mentioned Shell has developed new nitrogen gasoline additives. That took research.
They need not invest in nuclear technology either. That has been done by GE and Westinghouse/Toshiba who are in the electricity generation business.
If there are profitable avenues for research, someone will do it. Shell has elected to stay to it’s business.
I understand business, but I also have concerns for our future generations. Which is more important?