I do not totally understand the question...

do you mean that if there is no Hell that people should realize "why am I praying and worshipping anyway? There is no Hell anyway." Is that the question?

If so, yes... I would still worship him. Why? Because of all the things he has provided to me.

And just FYI, the scriptures says that there won't be a "hell" anymore as we know it today, in that.. the devil will be defeated and cast into the "pit of fire". Which means that "Evil" won't be able to manifest itself anymore.... Yet all those in Heaven won't stop Loving and Worshipping God...

The answer of "why" and "how" is greater than me, but you get the idea....