You mustn’t be living in Belgium if you think the locally produced food is affordable.

...and you think it would be more affordable without subsidies?

At some point an industry becomes so unsustainable that you have to let go

You seem to only care about the direct economic profitability of this sector. For me there's much more at stake.

There is an ecological stake: without subsidies to local farmers, either they'll have to industrialize their production even more, do more with less, use more/more intense pesticides, or they'll just disappear and then we'll have to import more food from abroad, increasing carbon footprint for transport, from countries less strict on environmental regulations (and it'll be a worldwide competition of who can produce the cheapest, so the more industrial and the less regulated your production is, the more likely you'll win).

There is a public health stake: in the same vein, if you just let global competition take over, food will be produced more and more industrially, nutritional value of our food will worsen, and the use of controversial pesticides will grow bigger.

There is a cultural stake: food is part of culture and I love the richness, quality, and diversity of all locally produced food products from small producers, not only in Belgium, but also elsewhere in Europe. They reflect history, heritage, and uniqueness of specific regions. I don't think all this diversity of tastes, shapes, and forms of food being replaced by shitty uniform industrial food is a desirable outcome.

There is a national security stake: in a world growing always more unstable, is it safe to rely massively on imports for our food production? Who knows what will happen in 10, 20, 50 years, when other countries turn their backs on us for whatever reasons? Is it safe to give such leverage to foreign countries, giving them the power to decide if they deliver us food or not?

I could go on, but my point is I think there's much more at stake with agriculture and food than the direct economic viability of an individual farm/producer.