Thank you. We may not be a big country, we may all have got sadly used to many more horrific incidents happening on an almost daily basis, and fortunately in this case, there were no serious injuries and the attack was prevented from becoming an awful lot worse.
But some of us still know and spend a lot of time there (Westminster is a beautiful area. I would often go into work an hour early so I could wander the nearby St James Park and take photos around there before going in). It is still our country. It is still an incident that occurred because somebody intended to cause large numbers of injuries and fatalities in an attempt to cause terror. It is still our capital city. It was still an incident that involved people being intentionally run over. It was still our police officers and emergency service workers running into the midst of a situation with no awareness of any danger they faced. And it is still an incident that took place metres away from where 4 members of the public were run over and a police officer fatally stabbed by a terrorist in a similar incident (just a couple of months before another 8 members of the public were killed in a terrorist attack in a nearby part of London and before 22 people lost their lives in the Manchester Arena bombing).
We can still care about multiple things. One incident happening in one place doesn't mean we don't care about what is happening elsewhere. Caring that the city I know so well was the target of an attempted attack yesterday (and seeing the places you know and love cordoned off, large numbers of armed officers [bearing in mind the majority of our officers aren't armed], evacuated buildings and worry) doesn't mean I don't care that 39 people lost their lives in the Genoa bridge collapse yesterday or that horrendous attacks and abuse is taking place elsewhere in the world.
The publicity will die down very quickly from this one I suspect, with fortunately no serious injuries. But it still matters.