Exactly
To make a reliable Sea Typhoon means you need to redesign the under carriage (strengthen and probably move), reinforce the whole air-frame and re-balance the whole aircraft. It will cost billions that the UK don't have in the 2000's. And that's before you find out that pilots can't see the carrier's deck when they land (the canards aren't in the right place for that).
The reaction of the Indian Navy, awkward silence, to this offer was telling on what they thought BAE could do.
That's what I was supporting, but, sadly, that ship has sailed when the UK choose the Hornet. It's redundant to buy (most likely building under license) the Hornet and then pay for the development of the Rafale (even if it's half), specially when you take into account that the Rafale is not what the RAF wants (a big aircraft with a big radar specialized in high altitude interception of bomber over the North Sea).