Benchmark it - your air-gapped DAW is almost certainly spending very little of its time making system calls, and depending on workload, your Postgres probably isn't either. You'll get 25% back on syscall-heavy workloads but your workloads probably aren't syscall-heavy.

I would rather just enable this stuff, honestly. Which I think is the point.

Yes, that's precisely my point - the webpage appeals to people who want easy answers whether or not the problem has easy answers.