Back when WHATWG was organized, I thought similarly. But in retrospect, it was a mistake. W3C moved slowly, yes - but the result was an actual standard. Now, it's a target moving so fast, and with so many evolutionary dead ends, that we're back to the days of "this site is best viewed in ...".

Google profits from this in two ways. Because they own the largest browser by market share, the ... is usually that, making other browsers less viable. But in addition to that, this significantly raised the barrier to entry for any competing browsers - remember what happened to Edge?