Since no one has come up with an answer, I'll give it a try.
Both cameras will do a good job as the family camera.
But you are comparing two different type of cameras.

The SX280 camera will not perform well enough in low light to give satisfactory results in most cases.
If you use the manual controls you can work around many of the short comings.
But you seem to have no interest in learning how to use those controls.

The DSLR cameras can easily handle low light situations but you will need more lenses.
i.e. Action shooting in low light or indoors, requires a special lens.

To do the jobs listed, the price increase over the SX280 is quite large.
At least 5 times higher.

I have no recommendation for any camera that will meet your expectations.