On the contrary Kvothe, I found that the skills I developed in further maths benefitted me within regular maths. Notation, presentation, problem-solving, and a skill to realise what is happening within a question as opposed to just being told. Playing around with maths makes me understand maths, and equally enough within physics I have found that I apply mathematical skills gained in further maths.
Now, I can't vouch for biology or chemistry, as I take neither. But all the sciences require a set of good maths skills. So, I would conclude that developing good mathematical ability helps one in all sciences.
But that's just my opinion.
Others have not shared this, as they find that further maths only helps them in further maths. It's different from person to person, really.