Disagree -- tailwind is likely the fastest way to get a barely-passable design. (Certainly faster than using an external component library then realizing ones you need are only available under the paid, "premium" collection).
And to say that design "just doesn't matter" while you're in fundraising mode, i think is also incorrect. You don't need perfect design, but it has to look pretty decent. It's in people's nature to be turned off by ugly/obsolete looking web pages.