There would’ve been people making the same arguments for Koeman to stay when it all hit the fan with him.
The button was pushed on Koeman out of fear we'd go down. That's how we ended up with Allardyce to make sure 40 points were reached. Although as it turned out we climbed up the league by the time he took charge.
Same with Silva as well last season.
There's no danger of that this year. The danger is mid table mediocrity.