The problem seems to be this...
Isa 55:8 For my thoughts are not your thoughts, neither are your ways my ways, saith the LORD.
Isa 55:9 For as the heavens are higher than the earth, so are my ways higher than your ways, and my thoughts than your thoughts.
It doesn't matter what seems right to us. It doesn't matter what we think at all. Our ways and thoughts are not God's. Our first parents decided they could decide right or wrong and here we are.
God doesn't leave it up to us to decide how to worship Him, what days to celebrate and how. He tells us. What He leaves up to us is whether we will or not.
Free will. People have been trained by the world their whole lives... Myself included, but this should not be so, this is why we must IMO, set our minds to do as Yahweh says.
Proverbs 1:29-31, "Because they hated knowledge, and did not choose to give reverence to Yahweh! Since they would have none of my counsel, and despised all my rebuke and warning. They will eat the fruit of their own ways, and be completely idled with their own devices."
Isayah 30:9-13, "That this rebellious people, lying children, are children who will not hear; (listen to), the Law of Yahweh; Who say to the seers; Do not see! Who say to the prophets; Do not prophesy right things to us, speak smooth things to us, prophesy deceits; Get out of the way, turn away from the path, cause the Holy One of Israyl to cease from our presence! Therefore, this is what the Holy One of Israyl says: Because you despise this word, and trust in oppression and perverseness, and stay there on. Therefore, this iniquity will be to you like a breach; a weakened wall ready to fall a bulge of a high wall which breaks suddenly, in an instant."
Romans 8:5-8, "For those who live according to the flesh, set their minds on the things of the flesh; but those who live according to the Spirit, set their minds on the things of the Spirit. For to be carnally minded is death; but to be spiritually minded is life and peace. Because the carnal mind is enmity against; (bitterly opposed to), Yahweh; for it his not subject to the Law of Yahweh, nor indeed can be. So then, those who are of the flesh cannot please Yahweh."
Isayah 24:1-6, "Behold, Yahweh makes the earth empty and makes it waste, perverts the face of it and scatters abroad its inhabitants; And it will be: as with the people, so with the priest; as with the servant, so with his owner; as with the maid, so with her mistress; as with the buyer, so with the seller; as with the lender, so with the borrower; as with him who takes usury, so with him who gives usury to him: The land will be utterly emptied and utterly plundered, for Yahweh has spoken this word. The earth mourns and fades away, the world mourns and fades away, and the haughty people of the earth languish. The earth also is defiled under the inhabitants of it, because they have transgressed the Laws, changed the ordinance, and broken the everlasting covenant. Because of this, the curse has devoured the earth, and they who dwell therein are desolate; therefore, the inhabitants of the earth are burned, and few men left."
1 Kepha (Peter) 4:17-18 For the time has come that judgment must begin at The House of Yahweh; and if it first begins with us, what will the end be of those who do not obey the message of Yahweh? And if the righteous are scarcely saved, where will the wicked and the sinner appear?
Romans 6:16, "Do you not know that when you present yourselves to someone as slaves for obedience, you are slaves of the one whom you obey, either of sin resulting in death, or of obedience resulting in righteousness?"