There are many family activities run by the Mormons here. League Basketball and soccer, football etc. They are less competitive and more family friendly. By family friendly I mean they take into account people have kids. So practice is scheduled for the half hour before the actual game. It’s revolutionary to kids and sports. I can put 4 kids in soccer and it takes only a Saturday morning. Sportsmanship is key and no parents are problems on the sidelines. Growing up like this did have disadvantages. no doubt, Parts in plays and spots on sports teams in the schools are given to mormons. Mormons build wards next to the schools and in high school the mormon kids get school credit for classes at the mormon church. But when I attended Catholic school as a non Catholic it was of course the same for the Catholics. And yes, I understand I live in a rapidly growing area, but the mormon influence does not shrink. It is growing even faster then the general population. I worked security at the opening of the new temple two years ago. Over a million visitors.
Mormons in general have wonkey theology. And they inflate their numbers internationally for sure. But I assure you they are not trying to keep the wheels on. The Catholic Church in my area is sick very ill. And shrinking.
There is a marked move to relax in the mormon church, this you are most correct on. However, it is no different than the Catholic moves. In fact perhaps less pronounced. Maybe, following your logic the Catholic Church has done what you think the mormons have done. Altar girls, relaxed rules, a changed way of worship for the Mass, dietary rules relaxed, dress relaxed, different ministries for the youth ie Lifeteen, and life teen Mass. Music, language changes, CITH, etc. All in an attempt to keep the wheels on. It doesn’t work does it? Or maybe the Church has made changes to fit in more with the modern times not as an attempt to keep more people But rather make adjustments they feel make more sense for a changing style of worship (though you and I may not agree they make more sense)
I will say that numbers can and are manipulated by all sides. The Catholic Church claims 1 billion. Plenty are baptized Catholics who do not practice. Probably the majority.