Conservative Cates calls to end two child benefit cap only after she is voted out as an MP

2015: Conservative Chancellor George Osborne introduces the two child benefit cap
2024: Former Conservative MP Miriam Cates objects to the two child benefit cap
Cates became an MP in 2019, but only now when out of office in 2024 is she calling to scrap the Conservative policy of a two child benefit cap
Why is it that so many Conservatives only call out Conservative policy when they are no longer MPs?
Is it because as an MP she was able to claim £5,500 per child under 18, up to three children; Cates has three children