Why can no theist summon god to prove his existence and end the debate?

The thing is that it doesn't matter if a creator god exists because there is no reason to believe that he would need or want our worship or would even care if we acknowledge his existence.

There is no reason to believe he would judge. Ancient people saw people die from lightning, floods, tornadoes, etc., and assumed this was God judging them, and they then created religions based on that. We now understand the science behind those things.

Theists all dismiss the scripture of other religions but they refuse to accept that, even if there is a god, there is no reason to believe that their scripture actually represents that god.

There is no debate required God has given us the choice to believe or not Deut 30;19-20  Life or death Your choice will effect your offspring

God does not need to prove himself to the damned, but God does call to those that have an ear to hear to enter the kingdom of God. What you should worry about instead is why you can not hear the call, while many others can!  Many hear the call and reject it but still know they were being called. 

John 3:19-21

 And this is the judgment, that the Light has come into the world, and people loved the darkness rather than the Light; for their deeds were evil.  For everyone who does evil hates the Light, and does not come to the Light, so that his deeds will not be exposed.  But the one who practices the truth comes to the Light, so that his deeds will be revealed as having been performed in God.”

Matthew 22:14

For many are invited, but few are chosen.”

Because God

being God

is not subject to the summons of human beings.

Why can't an ant summon President Biden to prove his existence?

God will summon you one of these days and then you'll know why.  Refer to Hebrews 9:27

Because God is not a genie in a lamp, bucko.

For some reason it's exactly like no gods actually exist.

For the same reason an 'all powerful' god can't prove his existence and end the debate.

Because they have no tangible proof that  any god(s) whatsoever exists  even put simply