Reading about it later, I see that there is wisdom in what Hiroshi Okuda said. It is an example of Japanese long term, careful thinking. From the Seattle Post:
"I'm concerned about the current situation surrounding GM. Although a trade conflict, like ones (that) happened in the past, may be avoided, there may be some impact (on Japan's car industry) because the car industry is symbolic in the U.S. economy," Okuda was quoted as saying by the Japanese daily Asahi Shimbun.
There are several reasons why Toyota would want to moderate its domination of the American auto market. GM and Ford sre both huge companies, and the failure of one would be devastating to the US economy. Toyota would lose business, because many fewer people would be able to buy new cars, as the economic shock wave rippled outward.
As mentioned in the quote, Toyota is wary of a "buy American" backlash, that would also hurt their sales. Toyota wants to avoid protective US government intervention, in an effort to save Detroit.
The failure of GM and Ford would also be devastating to the supply base, which either supplies Toyota or provides competition to Toyotas suppliers, keeping prices in check.
Toyota wants to win, but it has a timetable for its goals. Toyota is patient.