Linus' response is that calling it an infeasible problem is a cop-out. The right way to go about it is to fix them all, incrementally if need be, and not break userland in the process.
These comments sound analogous to real world security and societal issues. Like, the desire to increase army size and addressing the underlying issues.
One is a short term solution, the other long term.
One is a short term solution, the other long term.