There has to be something for man to measure up to when he is seeking perfection so that one has no choice but to seek God on the assumption that He is perfect. He may of course not be perfect so what does man do except follow a Holy Book or a Messiah who is acknowledged as being the anointed one, right?
That is true. IMO, you could use almost any religious law.
For Christians, if I were to take just one that Jesus mentioned, "If you so much a look and lust, you have committed the sin of adultery in your heart". That eliminated perfection on the vast majority of people on the earth.
One could work at not doing it, but perfection in God's standard is never having done it.
In another belief system, if it were "I will ask myself daily, “How can I serve?” and “How can I help?” The answers to these questions will allow me to help and serve my fellow human beings with love.", the moment one is suppose to serve and didn't or didn't do it with real love, then that person is no longer perfect.
One could work at trying to achieve it, but God's standard of perfection would be having done it perfectly.
If Sharia law says "Don't steal". The moment that person took a paper clip from the job or a pen, he would have stolen.
For those who decided to be Christians, it is simply for those who have come to a place and said, "I am not perfect and can't reach Heaven (or any other word for it) on my own. I recognize that only the Creator, Almighty God, can make me perfect through the atoning sacrifice of Jesus through the cross and His resurrection".
Hopefully I explained with clarity.