You're right, but I think it would be far far better to have the resources and financial backing of an educational establishment with government grants. Individual growers, or even collectives, only have the ability to collect only a fraction of all the land-races available. But it's definitely better than nothing.
By the way, if you're going to save landrace seed it's a good idea to plant the seed every few years and do an open pollination to refresh your seed stock, because even with the best seed storage techniques used by growers they eventually lose their viability.
This year I am doing exactly that with some landraces that are tolerant to the climate in the northern hemisphere - ones from the Himalayas - Garwhali Shiva, Malana, Kumaoni and Nepalese. I'm also using the pollen to cross all the landraces with each other, taking it from a really good male and dusting all the best females of each strain. I can't wait because I get to test out my new pollen bags that I bought last year which prevent pollen from escaping and pollinating other females that you want to use for sinsemilla bud.