If you want to learn on the job and are happy to accept an intern's salary, that's great. Most organizations will be able to accomodate you.

If you want $140k and can't code productively, most early startups won't want you. Larger organizations may be able to accomodate you.

There are a shocking number of candidates who apply to senior positions who flat out cannot code. I have hired in the past without doing the whiteboard exercise and been burned by this; never again. The whiteboard is a filter to eliminate people who misrepresent their abilities.