P G & E scheduled Power shutoff and Comcast back-up for service

I still do not understand why Xfinity/Comcast has not invested in generator back-up at Towers/hubs etc to maintain service during planned power shutoffs.  With several years to prepare it is unacceptable to have the service down "because we do not have power"  This infrastructure needs to be corrected with generator backup and staffing or we should look to the providers that do continue service during PSSD.  Very disappointed  Mikka1