Just reframe it as a corporation and it’ll make sense. John and Lisa decide to cofound a startup. They are 50/50 owners. They build the business slowly, but through efficiencies are able to build a small cash base. Using that bare they invest in ways to make more money. One of the partners focus on revenue generating activities while the other focuses on operations. As they build out their company the burden of revenue gets harder as does the burden of operations.
Until one day, one partner decides they are leaving the partnership. One of the partners is still doing revenue generating activities. The other is not. But they both own the corp 50/50.
You can’t keep generating revenue and keep all the profits for yourself and just kick the other person out. Likewise, you can’t commit “'constructive dismissal” where you make life unbearable for the other partner so they feel they have to leave to save their sanity. You’re stuck with partner. Either buy them out or they keep collecting 50%.
Almost like everything is political. Alnost like that