The vasr majority of households will have an array of sharp knives, scissors and other pointy tools desgned, and intended for functional use.
As horrific as knife crimes are, they're generally not done with standard domestic knives, and certainly not the types of attack that initiated this conversation; illegal knives bought for status and maximum harm value are used.
The percentage of domestic knives that get used in violent crime is very, very low.
There are already laws and age restrictions on buying blades that are proportionate to their functional use
It was possible to further tighten gun controls because guns are only a functional tool to a minority of people, and our existing gun control and culture already had that at a practical level to manage.
Humans have used blades since they bashed rocks and found sharp edges of flint. They are prety much our earliest tools
It's not blades that are the problem, it's a minority of people who are drawn into dangerous violent subcultures and ideologies. Cars and other motor vehicles have already been used world-wide for mass murder and maiming. We can't ban those too.
It's a culture problem not a tool problem.