Workers also typically live on caravans near/on the fields in very cramped quarters to save commute time/cost.
That could easily be changed to a more distributed method with per-worker wheelbarrows or backpacks, but presumably that would decrease throughput and increase costs.
I'd rather have less strawberries, that are more expensive, than have strawberries picked by someone who died as a result of contracting COVID-19 in a field whilst they were picking strawberries to earn money to feed themselves/their family.
It turns out policing entire supply chains by consumers isn't viable. Either enforce regulations, or do nothing. The middle ground of trying to shame companies into doing 'good' things just leaves uneven playing fields for companies without a public face to shame.
e.g. If a vaccine is realistically a year off (which is realistic, though we clutch onto every bit of preliminary news when in reality most are failures), in the relatively near term we will start to all have to take more risks, and the majority of us will go through COVID-19.