It's both true that Ryanair has very good safety record, and that in the past there were incidents with them landing on low fuel.

https://www.eurocockpit.eu/news/mayday-mayday-wins-over-ryan...

> In 2012 and 2013 “Brandpunt Reporter” broadcasted a two episode TV investigation in which Ryanair pilots, speaking anonymously, raised concerns about the airline’s fuel policies and company culture. The pilots revealed that the company may be exerting pressure on them to minimize the amount of fuel they take on board – a practice which limits significantly the fuel costs for the company but could jeopardise safety in certain circumstances. The direct reasons for this broadcast were 3 emergency landings of Ryanair aircraft in Valencia Spain on the 26 July 2012, within a short timeframe due to low fuel levels.

So it's sunk? They just had a major incident.