Sure, they might want to increase it a bit, but I don't think anyone sane is going for autarky in Singapore, ie 'stable staple food supplies should not be external dependencies.' Not even the Singapore Food Agency.
I think you made a flippant comment not realising how seriously a threat that food insecurity poses to Singaporean independence and now feel you can't back down, but you're just wrong on this one.
30X30 aims to supply 30% of nutritional needs by 2030 using only 1% of the land precisely to make progress towards 100% calorie self-sufficiency.