Checking the TAT it shows 11º...the EICAS procedure has us turn off the Eng Anti-ice.
It will even bring that checklist up at 10C
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Personally, I run with SOPs unless I have good reason not to. Getting in the habit of ignoring checklists is a bit of a slippery slope on the way towards normalisation of deviance, despite the fact that in this case it doesn’t really matter (you can go with the EAI valve deactivated open up to 38C ambient). The question is, would you do this on a line check? Are you happy with inventing a new datum of 11C for putting the EAI on, or maybe that should be 15C, just to be on the safe side, despite Boeing’s instructions?
As long as you turn it on if ground icing conditions exist, like you have to do after landing, then it’s not a problem.