I wonder from what angle they are coming at this. Is it the reasonable "a team of experts with sufficient experimental capacity can now prototype potent biological weapons much faster, even though they still have to test them" or is it the wackadoo "you can ask an LLM how to creat a bioweapon and it will list you all the steps".

The first one, yeah, sure but bad actors (including US) will always try to use any technology for such leverage. If second one, then it is a weak attempt at securing more funding.