Heh,...... low churches.
That would be where you are wrong. It is specifically because of the truth that is preached and taught that people are coming to Christ.
Certainly there is that aspect, but more than that, the local charismatic churches in my city (and I would guess 10-14 tend to be in constant flux because often times there is a "cult of personality" that surrounds particular clergy. All too often it seems that the leadership changes, and there follows an exodus to one or the other or even various and sundry churches.
To me, this is a sign of luke warm members with itchy ears and/or inconsistent preaching and application of preaching and doctrine, leader to leader.
Membership in the more traditional and High Churches tends to be much more stable; these members are less apt to move because of a Pastor, likely because of the high standards of training coming out of their seminairies. Three exceptions are Evangelical Lutheran Church in Canada (affiliated with the ELCA in the US and in fellowship with the Anglican Church of Canada); The Anglican Church of Canada, and the United Church of Canada; all three of these have fully embraced "woke" theology and radical feminism, and they are are imploding presently.
The most stable in our region are as follows: Catholic, Lutheran Church Canada, Continuing Anglicans (such as the Anglican Church of North America) The Presbyterian Church of Canada and the traditional Dutch Christian Reformed Church (Calvinist).
The more traditional Churches (to a greater or lesser extent teach a theology of the Cross; the other a combination of the theology of Glory mixed with a prosperity Gospel.
I agree with Tampa Steve, easy appeals to most of society who feel it is about them and they are entitled.