Yes, because saying ' you can marry him if you give up your job and the only life you have known' is not coercive at all.
I was wondering where on earth you get this sort of shite from while at the same time not knowing how many siblings the queen had, and then I realised - you've watched The Crown!
Spoiler alert - it wasn't like that. All Margaret had to give up was her place in the line of succession, which was pretty meaningless as the chances of her becoming queen were tiny by then. Here's an explanation of how the tv version is different from real life. Eden and the Queen were actually pretty sympathetic by all accounts.
^The Crown shows Prime Minister Sir Anthony Eden stressing the cabinet's opposition to the marriage and threatening the princess with exile for five years if she goes ahead.
The Queen tells her sister chillingly that if she marries Townsend she will no longer be a member of the family.
But in fact, papers available in the National Archives since 2004 show that the Queen and Eden drew up a plan in 1955 under which Princess Margaret could marry Townsend while keeping her royal title and her civil list allowance of £6,000 a year plus another £9,000 on marriage. She could live in this country and even continue with public duties if the public approved, as was highly likely.^