The point of banning assault weapons is to deal with MASS SHOOTINGS.
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And we had a ten year ban and it did just that
The number killed sure has increased in recent years. Each new worst mass killing is with rifles with high capacity magazines.
And still not nearly as large as the worst mass shootings in Europe where they've had all of this stuff banned for decades
Countries with strong gun control rarely have mass shootings. When was the last mass shooting in the UK?
But they still occur nonetheless. France has had multiple mass shootings over the last few years, including one that killed over 130 people. Norway had a mass shooting in which over 70 people were killed. China had an incident a few years ago at a train station where over 100 people were murders by killers brandishing machetes.
And as far as the UK, while they may not qualify as mass shootings, they've seen an uptick in gun crime and general violence overall in the past couple of years.
Bad people will find a way. You can't safety proof society no matter how hard you try. You only make it easier for people to be victims.