The problem is that they have the uncertainty factor inside.
Everything is possible.
Remember the Yishun MRT incident? We prevented that. But why on
earth did they choose this MRT station? Why didn't they choose a
station that will disrupt us? That's the uncertainty that we can't
match. We always think they will choose something that will cause
the maximum destruction, but their choice has shown that they don't
work this way.
No matter how alert we are, someone will definitely get through. We
can't predict that. We can limit that, through intelligence. But
how far can intelligence go? We can have checks, but can you limit
creativity? A normal ball point pen can trigger a bomb.
In everything, there's lose, there's gain. We lost lives, but we
gained experience. We know how to deal with this situation if it
happens again. Singaporeans will learn the hard way that it is
everyone's part to protect Singapore, not just the SCDF, SPF and
SAF.