No. They're essential to the sanity of the individual SRE oncall, and of the SRE team they are part of. It's also how institutional knowledge is preserved after successive rounds of oncall shifts.
If you think a playbook is bad, try being oncall for the first time for a massively (Google-scale) distributed system without a playbook.
> A list of commands you should run to accomplish X -> that's a script.
A list of possible root causes an SRE should consider, complex interactions with other systems that might be problematic, not overreacting to spurious alerts -> that's a playbook.