It's not really important. It's a pity but it's only a monument.
People are dying everywhere and anyone cry or act for them.
Burn Notre Dame de Paris and people touched by globalisation cry or think that it is horrible... Find the mistake...
This might sound harsh but think about this.
People exist for like 70 years approximate and then mostly it's over. The (grand)children will think about them and mostly will be forgotten eventually unless they did something awesome or horrific.
The Notre dame was started to exist in 1163. And is still important to so many people. Sometimes spending money for a life could change less than for an monument that existed for this long.
Don't get me wrong. I do care about human life's but this is a way to see it.