This is not necessarily true for all situations. Northern Europe is planning to produce a lot of electricity with offshore wind, but laying deep sea high voltage electricity cables isn’t cheap. There’s already a lot of gas pipelines that can be retrofitted for hydrogen transport at a much lower price. At a certain point it becomes viable to just use electrolysis and transport hydrogen using excess wind power instead of transporting the electricity to land and storing it in batteries.

There are also industries like steel production that are just not going to transition to electricity. Hydrogen has a place there too.

In China there is already small-scale nuclear district heating.

"China's Haiyang nuclear power plant in Shandong province has begun its sixth heating season, covering an area of nearly 13 million square metres - 500,000 square metres more than last year."

https://www.world-nuclear-news.org/articles/chinas-first-com...

Similar plans exist for Finnland. https://thinkatom.net/wp-content/uploads/2020/03/rauli-parta...

In Switzerland both Beznau and Gösgen nuclear power plant produce district heating in addition to power. Beznau makes available 80 MW of heat to industry and homes over a 130 km network serving 11 towns https://world-nuclear.org/information-library/country-profil...

In Slovakia since 1987, Slovak power utility Slovenské Elektrárne (SE) has been producing heat for Trnava, Leopoldov, Hlohovec and the municipality of Jaslovské Bohunice from the Jaslovské Bohunice NPP. This plant produced 429 GWh of heat in 2023. The high ten-kilometre hot water pipe between the Jaslovské Bohunice power plant and the Trnava heating plant began construction in 1983 and was put into operation at the end of 1987. Heat project for Mochovce NPP is also planed.

https://www.neimagazine.com/news/mochovce-npp-heat-project-u...

There are many plans and ideas for advanced uses of nuclear heat for industrial applications.

https://world-nuclear.org/information-library/non-power-nucl...