I understood what the person was saying, unfortunatley confusing 'rare breed livestock' with 'endangered species of wild animal' happens too often, to the point where people with certain breeds feel a bit 'naughty' crossbreeding with something else.
I remember when I first started with Wilts, ringing round numbers on the breed soc webpage and being told in hushed tones "I know its wrong, but they rear a superb lamb when put to the Texel"
They are your animals - do what you want with them, if we all thought like that, there would never be any new breeds of anything.
If it suits you, breed out agressive tups - it makes a whole world of sense to address safety issues before preserving an imagined 'wildness'....