A different culture. If you so much as address service staff in anything other than a polite manner anywhere you are likely to receive a very robust response.The French seem to take striking as a national sport. According to The Times, as of June 2023 air traffic controllers had been on strike for a total of 60 days this year. That would have a much bigger impact than any RMT strike.
If the leading classes over there press on with things seen to be unpopular amongst the general public, the response is to go on strike and set fire to things until they pack it in. See 8 years ago when Air France was proposing redundancies and striking works physically assaulted their executive management team. For all the talk of union thugs here can anyone see that happening in the UK?
In the UK when a multi millionaire proposes something unpopular for the "greater good", with a negligible impact on themselves, and some people withdraw their labour to protest, instead you have Big Daz the painter and decorator with some nice stuff, all on finance saying "yeah! I don't go on strike. Sort em out".
It's a delightfully British thing.