Because you are attempting to equate a way of thinking and acting in order to make a living having a physical brand.
Refusing to think and act in accordance with a tyrannical Beast is what the passage in Revelation is referencing.
Ezekiel 9:3-6 reveals spiritual marks placed on the heads of those who did not grieve over all the detestable things being done in Jerusalem. Those with the mark were spared, those without that mark were killed. It was not a physical mark because God ordered Angels to make those marks.
Yes, I don’t think the Angel marks are physical, because it doesn’t seem to indicate that. But the context of Revelation says something different about the Beast’s mark. First, it can be in forehead OR HAND, and it is visible so people can be prevented from buying or selling. All of those indicate a physical mark of some variety, so I think the weight of evidence leans toward a physical mark.
There are other theories, yours is a common one, and I’ve considered it but don’t think it accounts for all of the BIBLE evidence.
No!
Revelation 20:4
“And I saw thrones, and they sat upon them, and judgment was given unto them: and I saw the souls of them that were beheaded for the witness of Jesus, and for the word of God, and which had not worshipped the beast, neither his image, neither had received his mark upon their foreheads, or in their hands; and they lived and reigned with Christ a thousand years."
A way of thinking can be changed, but not a permanent mark.
This will require an irreversible decision, not a compromise nor vacillation from which one can have a change of heart.