Ask HN: Why some startup equity agreements have “repurchase on divorce” clause?

I've noticed that some startup founders equity agreements have introduced a "repurchase right on divorce" clause that allows the company to repurchase shares of the company stock upon involuntary transfer of the stock from a founder. For example, if the founder`s spouse owns equity as a part of common property and there is divorce, shares could be repurchased from founder`s spouse. That is shitty, in my opinion. What is the main reason behind that clause? Is it a must-have, or VCs don't really care?