You are correct. I think we sometimes forget that Trump is the only one making a huge sacrifice in all of this.
Trump has nothing to gain by running. The White House living environment is not as good as what he already has.
He does not need fame or connections like the Clintons did in order to make money, he already has money.
His ego is not clamoring to meet with world leaders, he already has met many world leaders.
Look at Trumps children. They are not out trashing him or being rebellious. They love and respect their Dad and do not need to be on the front page of every magazine. When Obama ran, his PR agent made sure and still does, that he gets the best press possible. When Kerry ran, he had his girls front in center in order to get more attention in the tabloids.
Trumps children are competent adults/parents and they are busy WORKING. That is what Trump does. He WORKS. Unlike politicians like Obama, Rubio who misses votes, Trump actually puts in a fuels day work and knows what it is like to roll up his sleeves. Unlike the others who sleep in late, get a massage and go to a fundraiser.