> Tell me, what is the doomsday scenario causes by higher availability of faster growing rice?
In concrete pragmatic terms, "If you build it they will come" - eg: building out six lane highways results in more traffic (and more FF demand (until more green vehicles are available for masses)).
The direct result of improved food production has been significant post WW population expansion globally, and with that, hand in hand, greater human consumption leading to larger resource drains and greater impact on the insulation factor of the atmosphere.
Population is still increasing, it's on track to peak ~ 2050, then fall and likely stabilise at some as yet unknown lower level.
The still pressing issue is that the number of people with large western level consumption patterns is expected to increase, even as total population falls.
> Your form of panic
I'm Australian, I don't panic and beside I'll personally be dead before this is an issue for the people that come after me.
These are, however, real issues. Even if you personally don't see any problem.