Exactly! We learn to trust His Word, His instructions, too, even if we don't understand why. Just as a child learns to trust his/her parents who don't lie to them, like many parents, sadly, do! (Satan Claus stories) (Threats they don't follow up with, etc.) Even though Abraham did not understand God's command to go and sacrifice his promised son, Isaac, he trusted Yahuah/Yahweh (?) (Actually, He revealed Himself to Abram as El Shaddai, not as Yahweh, according to His revelation to Moses).
Point being, God does not lie to us. He is the only trustworthy One. He knows what He's doing. If He says it or commands it, it is for our good and His Glory. We all have so much to learn about Him yet, don't we?
So, even if we don't yet understand why He directs us to keep a command we need to trust Him and keep it. Why keep "food laws"? Because God knows what's good for us because He designed and created us! "Oh, but those Israelites didn't know bout trichinosis back in them days and didn;t know that heating the pig flesh to 160 degrees would kill the worms. And besides, we raise pigs in clean environments now...so bacon is OK and pork chops are so yummy!" they say...."And rabbits and squirrels....so yummy" "And shrimp and lobster? Delicacies!" "Bottom feeder catfish, too!"
Sure, there ARE spiritual applications to God's instructions about what we should digest, whether physically for our bodies but also regarding what teachings we should contemplate to keep us pure and holy as we stay alert to polluting shatanic ideas and deceptions and "food" sacrificed to idols or the dung that comes out of many "preachers'" mouths...but, again, God knows why He commands what He commands and He can be trusted! Thank God!