I think this is good as far as it goes, but it’s still wrong. To a certain extent, it should be as obvious as anything that we should trust an infinite God, infinitely. And our lack of ability to do that even a little bit is probably a pretty good measure of how far short of God’s glory we fall in other areas.
BUT. It’s not as though God makes it obvious and easy to trust in Him. He delights in being trustworthy, and He wants us to delight in his trustworthiness by trusting Him. And to delight in Him more and more is to trust Him more and more. But trusting more and more requires greater and greater challenges to that trust. So God deliberately sets up scenarios where the risk is ever greater to take Him at His word.
If faith were easy, it would just be presumption.