Maybe ask his wife

Who was appointed by Trump to be Secretary of Transportation

Who apparently doesn't work

That's just a general rationale for why McConnell acts the way he does. Money and Power (and freedom).

But once you get into his Wife's family....

In April 2008, Chao's father gave Chao and McConnell between $5 million and $25 million,[70] which "boosted McConnell's personal worth from a minimum of $3 million in 2007 to more than $7 million"[71] and "helped the McConnells after their stock portfolio dipped in the wake of the financial crisis that year."[72]

As Secretary of Transportation, Chao appeared in at least a dozen interviews with her father, a shipping magnate with extensive business interests in the United States and China.[73] Ethics experts said that the appearances raised ethical concerns, as public officials are prohibited from using their office to profit others or themselves.[73]

So he has reasons, they just aren't ethical.