It makes good practical sense to renew this Boot as a matter of safety when giving your braking system a makeover.
The more parts that are renewed in the assembly the more reliable the outcome, and the time saved by not trying to repair the irreparable can be best spent on other areas of machine maintenance.
Renewing this item will save time and provide a safer braking system.
Are there any other parts that may be better being renewed than repaired in the brake assembly?