There is nothing wrong with that if that is the type of company you build from the start. VC funded startups generally want to have an exit/IPO to get a return for their investors and give their founders and employees an opportunity to cash out and de-risk. Without an exit or IPO that is a lot harder, especially for employees.

It's about the expectation of everyone involved.

Eventually every company needs to turn a profit, so for the company it might not make that big of a difference or even be better (if they can turn a profit which I assume Figma can), but for the investors and individuals involved it's a very different situation as it means their capital is pretty much stuck. And I bet a $20B exit would be life changing money for a lot of people involved.