I have a neighbour who has just spent 1.5 million expanding. Try telling him he is not in an investable business.While in an ideal world I would agree, we don't live in that, nearly all farmers in Europe and the USA get sub in one form or another, world markets are excesses being dumped, because farming is poorly managed, I say poorly it's more maintained in a state of over supply.
I would ask you to do some basic maths and research, for the uk farmers.
A few facts in the uk we farm around 17.2 million HA of land about 36% is arable the rest grass or ruff grazing.
The average price of land is £8900/ acre which is down 10% from last year, more info can be found hear.
https://en.m.wikipedia.org/wiki/Agriculture_in_the_United_Kingdom
Do some maths like I said what return on investment do farmers get,
Add the value of their holdings don't forget machinery, buildings, live stock, and crops. now you know what they have invested now divide total income by the number of employed people in farmer work out the % return on investment......and average wage.
Farming is not an investable industry it's not actualy a business that even remotely stands up as one and this is Euro wide and nearly world wide, food is just too cheap, for it to be remotely subs free and sustainable, I wish it was in the uk but it's not.
When you see that no new farms can be started because the numbers don't allow it by that I mean if I had the money to buy my farm it would earn me more just in the bank earning minimal interest. Than it actual earns me.
You then see why keeping the ones we have going is so important.
Once we stop there will be little that could restart the industry in the uk.
For sure most countries support agriculture and I expect the UK will continue to do so in one form or another.
Trying to justify such support on the basis that food production is essential to the UK is, however, futile. Food is a strategic resource presently in plentiful supply. That can change - and so can the support stance.