"It would be best if ..." vs "It would be the best if...", which one is right?

"It would be best if you could …" vs "it would be the best if you could…", which one is right?

I search it using google and find most people say "would be best" without a definite article. While I thought "the best" is a situation that is known to all so it should follow a definite article. Is it because we always use "It would be better" therefore we drop "the" when we use "be the best".

And there is a similar question about whether "be best" is grammatically right or not
“Be Best” – is the grammar right?