• Because it is the usual practice in heaven.
It is the usual practice in heaven for all the creatures therein, including the twenty four elders, to worship God 24/7 (Revelation 4:8-10). One of their worship pronouncements found in Revelation 4:11 is now adapted into a melodious worship song that goes like this:
”Thou art worthy; thou art worthy, o lord
To receive glory, honour, and power
For thou hast created, all things.
And for thy pleasure they are and were created”.
As children of God, our major aim should be to attain heaven and if we are dead serious about this, then we must strive to become proficient in what the routine is there. And we can start, by getting used to worshipping God at all times.