Hi Lyle,
I will confirm your opinion. If the doors don't have to be fire doors then they do not need additional seals.
I believe that your legislation is set up to protect life only, as it is elsewhere in the UK. I also believe that the guidance you use to ensure legislative compliance (i.e. life safety) does not require fire doors on the rooms off a corridor where there are two directions of escape and where no rooms off the corridor are used as sleeping accommodation. On that basis, I would respectfully ask the person issuing the cold smoke seal requirement for formal confirmation of what guidance they have used to underpin that requirement.
There might be a good reason for their requirement that wasn't obvious or made known to you, for example a sub-dividing door might have been removed or one of the rooms off the corridor might be used as a first aid and recovery room (akin to sleeping accommodation) or maybe more people resort to the premises during functions than the final exits can accommodate so they want to compensate by protecting the corridor (could happen!). I'm just plucking possible reasons out the air here but the point is that there could be some reason that you are not aware of. Having said that, the authority having jurisdiction should always make it clear when they issue a requirement what the reason for that requirement is (it's shoddy and unprofessional if they don't). They obviously haven't done this in this case so my next guess would be that they do not know what they are talking about. What's new? Appeal.
One final thing to bear in mind is that someone at some time in the past has made a judgement to fit fire doors to these rooms for some reason that they perceived as a benefit. It might be that they were considering property protection or business continuity. If so, maybe there is some benefit to be had from fitting the seals to the doors. I would discuss it with the RP. If it's quite cheap to fit the seals then maybe the RP will choose to avoid conflict and fit the seals to enhance the property protection and business continuity measures that are installed.
Stu