This is a strong positive imhe:

"- Step 1: handling it

- Step 2: making sure it doesn’t happen again

So when a major issue happens over the weekend only Step 1 happens during the weekend. Step 2 involves following up with other teams, creating new alarms and updating the runbook. And all that usually happen during the week. The oncall is going to spend at minimum their Monday doing that so it’s better if the schedule reflects that."