Whenever someone starts to talk about their own problems and shortcomings, and then tries to get _you_ to agree that those shortcomings aren't really _their fault_, be careful; not only are you being lied to by them, but they are also being lied to by them.
And if they get _you_ to concur, then the defense against change has succeeded. The status quo remains untouched.
If this lady ever starts swimming more often, it won't be because a bunch of other people agreed with her idea that discipline is the enemy; it will be because she found some.