That isn't the whole story.
He was autorotating to where he knew there was a Little League ball field, which would give him ample room for a safe touchdown. But as he got closer he saw there were kids playing on the field, so he veered to one side and in the veering put the 'copter out of position for a soft landing.
Like all U-2 pilots, he carried the silver dollar with a poison 'suicide' needle secreted in it, even though CIA's personality tests indicated he was incapable of suicide. But his concern for the safety of those kids overwhelmed his instinct for self-preservation, and he died as a result.
I had read a book saying that Lee Harvey Oswald was a guard at the facility that monitored U-2s coming into Japan. it Supposed that he knew the altitude they cruised. It stated that Powers was shot down after Oswald defected to the USSR
Crash site;
https://www.thisdayinaviation.com/1-august-1977/screen-shot-2015-10-16-at-18-52-02/
Examination of news photographs of the wreck show that the JetRanger was completely destroyed on impact. It appears to have struck the ground in a nose-down attitude. Surprisingly, damage to the main rotor assembly is slight, with no twisting, tearing, or failure of the doublers at the blade root, as are commonly seen.
An engine failure over a large, level open space, should have resulted in no damage to the aircraft or injuries to its occupants. The autorotation characteristics of the Bell 206-series helicopters are excellent, among the best of any helicopter. The extent of the damage to the airframe, though, when compared to the relatively slight damage to the main rotor assembly, convinces TDiA that the helicopter was not in autorotation, but in free fall. The main rotor blades were not turning within the autorotation r.p.m. range of 355–440 r.p.m.
There are reports that Powers turned the helicopter away from a group of children playing in the open field, but this would not have been possible with the main rotor turning at the very low rotational speeds demonstrated by the lack of twist damage.