Showing Respect
This theory appears to be widespread, at least among the British populace. The public tends to believe this hypothesis. And, as for William, a poll commissioned by StatistaCharts revealed that nearly half of the British public wants to see him ascend to the throne, not abdicate.
The Proceedings
On the internet, Diana is said to have had conflicting emotions about Charles becoming king. As surprising as it may seem, the marriage did not end on a happy note. When she appeared on Panorama in 1995, she referred to this while speaking about it.