You find it weird that Hashem would give us halacha to follow because it’s what’s best for us and that sin is harmful? Hashem gave us mitzvos that are arbitrary? Some muslim philosophers believed that, that was their version of chukim.
Ever go to 6th grade day school and learn that treif is metamtem es halev? I learned that in an MO school.
The mitzvos and halacha are called an aitz chaim, they are ki haim chayenu…this is “weird”?
That’s how seforim explain the difference between yiras shomayim and yiras chait; yiras shomayim is fear of Hashem, either punishment or awe of His greatness, and yiras chait is fear of the spiritual damage of the sin itself.
That’s what we have gehinnom for, to cleanse us of the lichluch hacheit.
If there’s anything “welrd”, it’s your notion that such basic judaism is “weird”.