You already drop the noun at the sabzi-mandi
At an Indian market stall you'd never repeat the vegetable — 'le doonga, do de do' assumes the item is obvious. Italian does exactly this with the pronoun: '— Prende il caffè? — Sì, lo prendo.' For 'ne', Hindi makes the count-vs-amount split intuitive — 'do' (two) for apples you can count, but 'thoda' (a little) for rice you measure — the same difference as 'ne vorrei due' versus 'ne prendo un po''.
