You could test this objection using question #4 - "does it limit one of your roles?" - and it would probably help as facilitator have the objector get really clear on what the harm is for the role.
Couple of extra thoughts:
- "for me personally" - definitely doesn't sound like a valid objection!
- "it will affect my performance" - sounds like there could be some validity in here (IE there could some harm being done to a role - a role is left less able to express its purpose) - but at the moment it's not clearly specified, and it's tangled up in the personal objection. So use the process to tease the two apart.
Hope that helps!
Best wishes, Andrew