There is one consideration which favours at least a look at a feathered landing for training familiarisation. On a prop aircraft with significant (as in lots of) power, the drag of the (asymmetric) operating engine during the flare as the throttles are closed can be a surprise on the first exposure.
Apart from that I concur with the view that ill-considered practice (in all its forms) can kill you far more consistently than the less frequently occurring situation for which you were practising in the first place.