Should we forego every trial because no judge can be impartial? The argument is lacking.
That impartiality doesn't lead to economic success and sustainability for outlets is another story of course.
Cross checking is required even if journalists wouldn't be as active in framing stories of course.
Individual news sources have almost always been biased. This is why most cities had at least 2 major newspapers until relatively recently. You could get the liberal one or the conservative one (or in some places dozens of wildly politicized papers, anarchist papers from the early 1900s are great).
Consolidation has lead to a removal of voices from most local newspapers and the market has spoken when it comes to television: people prefer partisan news sources. The internet has gotten us closer to that 1900 view but then Facebook/Google became the arbiters of news for most people.
Only state-funded news sources are imune to that, of course they have perverse incentives of their own.
But many find these sources unengaging since they report events as they occur and do not contextualize them in media narratives to the extent that more commonly popular news outlets do.
> No one is 100% unbiased
No, and every journalist should know that and keep their own bias in mind when writing. One can have an opinion and still present a plausible alternative.
No one on this planet is 100% unbiased. It doesn't matter if it's free or $100 per article, it's still written by a human being with personal opinions, experiences, prejudices, &c.
The easiest way to get close to the "truth", which is subjective in many cases anyways, is to read from many sources and cross check the facts between them.