That arguments doesn't quite work.
And to the community: if Peddler is so good, than why is Training mediocre? It's a free Peddler per copy of the most common action card in your deck.
On many (most?) boards it's easier to buy Peddlers than it is to buy any other action card; with cards like Worker's Village and Wharf, the opportunity cost of a Peddler is often zero.
These boards are quite rare. Its case mostly in boards with wharf, goons or merchant guild. Otherwise opportunity cost is quite big. In most peddler rushes you need to build engine in otherwise suboptimal fashion by neglecting draw and instead getting +buy/cantrips. Most of time one player get 7/3 peddler split and second player has lot of mostly useless components. If its board where 5/5 or 6/4 split is likely there is almost no difference vs training on village.
Then there is question if with these rushes training would be better. Pawn with training looks great, same with candlestick maker. market square and worker village look bit weaker but its still good
Peddler is fantastic with most trash-for-benefit cards.
That only point that has merit.
Peddler is a great target for +something tokens from Adventures.
There is almost no difference, except that you could make peddler earn +2 coins with peddler, otherwise putting that token on cantrip with training is better. And peddler+buy=market square+training, peddler+action=village+training, peddler+buy+action=worker village+training.
Peddler works pretty well with Throne Room and variants.
Thats false, tr-peddler gives +2 cards +2 action +2 coin. Pearl diver with training gives same and possible deck reordering, so basically everything else is better.
Ultimately, Peddler has a significantly larger impact on the game than Training (or any of the cards in the bottom 11).
No, you shouldn't rate card without even thinking about it. And besides fairgrounds, nobles and probably card on 11. spot are better.