There was no market in land, so land could not have a monetary value in feudalism proper.

Not having access to land you had a right to farm (and therefore needing to be a tenant farmer of some kind or – even worse – a wage labourer) was pretty bad for a peasant. It was also hard/impossible to escape from on the back of one’s labour. It is in this sense that land (or associated rights) was worth significantly more than one could make through labour.