Fair. I've had one flight to the UK that cost less than the train ticket from the UK airport to my actual destination. Air tickets got a lot more expensive after the pandemic, but it's still close.
(OTOH, I've also had one case where it was cheaper to take the ferry and trains back from the UK to Berlin than fly, presumably because of massive demand as that was the day Stansted airport was closed by 1cm of snow and I had an 8 hour queue for a replacement flight that was itself also cancelled).
(OTOH, I've also had one case where it was cheaper to take the ferry and trains back from the UK to Berlin than fly, presumably because of massive demand as that was the day Stansted airport was closed by 1cm of snow and I had an 8 hour queue for a replacement flight that was itself also cancelled).