It's true that I'm mostly responding to tone. But again: if this is just a guide for people who want a certain lifestyle, for better or worse, why the warning to not avoid love? I think it speaks to an unresolved conflict.
The parenthetical shouldn't be there if PG really does want this to be a no-judgement how-to guide. Love is distracting, for better or worse.
Playing devil's advocate a bit, imagining an argument that definitely wasn't made in the essay itself, and which I don't necessarily think is right: It's possible that he meant that love seems like a distraction like others, but is actually critical in some way for doing great work. There are both kinds of stories out there, both those whose loving partnership was clearly critical to their work, and those who were isolated and loveless (but maybe would have been even more successful if it were not so?).
But I do tend to agree with you that if it is "how to pursue great work at all cost", then singling out love as the only distraction worth keeping is contradictory to that thesis.
The parenthetical shouldn't be there if PG really does want this to be a no-judgement how-to guide. Love is distracting, for better or worse.