Really? Would France have been more relaxed about a Defence Minister sharing a call girl with a Soviet spy? (Though not at the same time!)
However, after lying to the Commons, he did leave public life, turning up at a hostel for the poor in the East End, offering to wash dishes.
In time, he would use his experience and remaining influence to do much good for the disadvantaged.
But for this affair, Profumo could well have become Tory leader and later PM
Certainly before the scandal, he was a high flyer, had he been in public life when the 1963 leadership came up, he might well have won.
Instead they got the short lived, stop gap, Alec Douglas Hume, after losing the 1964 election (very narrowly), they ended up with Edward 'Grocer' Heath.