I think you have misunderstood. I don't think that anyone is suggesting that Richardson should play instead of Coote.
Of course Coote should play. The problem is, he won't have been practicing goal kicking for weeks. I don't think it is ridiculous to suggest that we should pick a fully fit, well practiced and recognised goal kicker. Both Coote and Richardson should play, with Fages on the bench.
And I don't think that people should just dismiss the idea of "a couple more conversions". In a tight game, they could be the difference.