question about using pretranied G2P model and train G2P model myself

[li-henan]

dear author， could I ask whether it is useful to train G2P model myself？after reading materials，my understanding is that g2p model training needs a dictionary firstly，but if I have a dictionary，why I straightly align my wav and txt. Is it right that dictionary can be complemented using a g2p model newly trained？ could you help to explain the benefit following these steps？ mfa g2p data g2pmodel out_dictionary mfa train_g2p out_dictionary g2pmodel

thank for replying very much.