And he’s telling you why in The Washington Post:

… I find it hard to get too worked up over all this, the way I did over the egregious conflicts of Donald Trump’s family during the last administration.

At least he’s noticing it and admitting it publicly and feels the need to explain it (or sees some advantage in purporting to need to explain it). Whether the reasons given are sincere, we can judge for ourselves: 

Perhaps it’s because, at bottom, the whole affair seems like less of a public scandal than a family tragedy — the sad story of a lost son careening recklessly through public life, and of the anguished father who couldn’t bear to stand in his way…. 
It is serious business when a president’s family member enriches himself through relationships with foreign actors….
[But politicians’ kids are] often haunted by crippling insecurity… [W]hen every door magically opens for you, it’s never really possible to know which ones you might have been able to open all by yourself. They’re befriended by people with agendas, adored and ridiculed by people they’ll never meet. It is not a normal life…. 

It must gall Biden to know that his predecessor, who never served a day in public service before becoming president, not only shrugged while his already-rich children enriched themselves further, but actually installed his dilettante daughter and-son-in-law at the highest level of policymaking…. That’s real corruption…. Biden didn’t let his son anywhere near the center of power and decision-making….