That appears to be saying that if you believe the right things nothing bad will ever happen to you. That's a patently absurd claim.
It is good of you to bring this up for us to examine in situ
According to Hebrew scholarship, the literary and historical contexts of Psalm 91 point to Moses as the human author and the wilderness tabernacle period of ancient Israel as the setting. In these contexts, the psalmist ascribes shelter, rest, refuge, salvation, rescue, protection, response, deliverance, satisfaction and life to God, the Most High, the Almighty, the LORD. The tabernacle was less of a physical shelter for the Israelites and more of a spiritual refuge for God’s people. The tabernacle served as a locus of God’s reconciling and relational presence among them.
Bible commentators pair Psalms 90 and 91, recognizing these as a spiritual portraits of Adam and Christ, respectively. Psalm 91 is regarded by Christian scholars as a messianic psalm.
A spiritual battle between Christ and ”the fowler” (Psalm 91:3) played out in Luke 4. An abbreviated version of Psalm 91:11-12: “For he shall give his angels charge over thee, to keep thee in all thy ways. They shall bear thee up in their hands, lest thou dash thy foot against a stone” is quoted in Luke 4:10: “He shall give his angels charge over thee, to keep thee: And in their hands they shall bear thee up, lest at any time thou dash thy foot against a stone” (KJV). Notice that “in all thy ways” is missing in the devil’s version in Luke 4.
Be blessed, my Friend.