Does this statement by Buddhadasa Bhikkhu conflict with traditional mettā meditation?

I'm a beginner and I'm studying (and trying to practice) both meditation on breathing and mettā meditation, and in the book Anapanasati by Buddhadasa Bhikkhu, which i'm following with some initial success, when dealing with preliminaries and false views, it is said: "[...] Some forms of "radiating loving kindness" are phrased in an amusing way, for instance: "May I be happy, free from suffering hatred, difficulties, and troubles, and may I live in happiness!" This really reflects fear and self love on the part of the speaker. How could a person with such a weak mind ever put forth the effort necessary to realize impermanence, unsatisfactoriness, and non-selfhood? With this kind of ritual he will only disturb his mind all the more. [...]" Now, i think almost every book and guide on mettā I've read suggests phrases like the one took as example in the above cited text. For example in Brahmavihara Dhama by Ven. Sayadaw it is suggested the phrase "May i be happy and free from misery" and similars. So the above mentioned paragraph confused me a bit. Do the Buddhadasa teachings conflict with traditional mettā practice? What view of things should a beginner follow, between these? Thanks in advance!