I agree with the sentiment, but you underestimate the level of engineering, coordination, design work, testing it is to do this.
It is admirable that they even have a half-decent browser, but to compete at the top you need soooo much money and motivation.
I’m guessing Ladybird will prove you wrong in due time
It'll be a usable product, but it will be extremely extremely niche, until the dev burns out or just quit it.
I hope I'm wrong, but a browser is a XXL type project and needs proper funding (means = there should be a reason for it to exist, not altruistic as lets have an alternate because reasons ..)