You cannot see things as he sees them. What do you imagine would be changed should the chip have never been? How might events have unfolded differently? John has imagined it many times, but he cannot know for certain. So, he chooses to isolate the variables. By removing only my existence, he preserves his own timeline.

It has nothing to do with you. Or, perhaps it is more appropriate to say it has to do with more than just you.