'Warfighter first, specialist second' does not mean the same as 'soldier first, specialist second'. It just means that you should expect to do your job in austere operational conditions, exposed to a level of danger that requires a greater degree of self protection skills and flexibility than the hotels-on-detachment element of the RAF has typically needed in the past. Although some extra training will be required the most important thing is the change of mindset to accept this.
No one with any brain cells is seriously suggesting that anyone in the RAF (exempt Regiment obviously) is ever going to be a soldier and still perform their primary duty.