Makes sense, normally MPAs make more money than front desk manager plus you are looking to work 5 days a week vs as MPA usually work 3,4 days a week and make more money.
I have seen a MPA at Pickering Angels who accepted to work at front desk.
There are some possible factors behind this kind of transition.
MPA does not like her job anymore due to some bad experiences.
MPA feels that her charm is fading and she is not gonna get many clients.
Her income as a manager is good enough for her needs plus she can still have couple of sugar daddies taking care of her financial needs.