"How can adverse effects of a future event be discussed by a rational person?"
Because rational people put them us as serious predictions
If you are unable to di so what are you doing here - as far as I can see, just throwing stones and running away

"without subsidies which are forbidden under EU regulations"
That is presuming -
a That the decision to leave will be reversed
and
c Corbyn doesn't decide to go the way he appears to be going to go and reform society by making those who have pay and re-introducing nationalisation - he's already promised that for the railways, why not other industries (what's left of them)
The point is that society is repidly crumbling and can no longer cater for the less well-off
Any Party that is prepared to accept that situation is not worth voting for.
The world will either swing to the extreme right or the left to address the situation - the right are already on the move
Jim Carroll