With due respect, you need to talk to a sailmaker to get things straightened out. There are a number of very good reasons for battens in mains. I don't have time to go into detail at the moment, but maybe others will have time.
(Battened mains, in my experience, have always come down without a problem. For short handing, sail handling systems, i.e., lazy jacks, etc... address the more critical issues as boat size and wind velocities increase.)
Battens started appearing sometime around IOR if I'm not mistaken. It was an easy and cheap way to increase sail area given fixed JIPE measurements.
Over time it evolved to full cord battens to try and give the most aerodynamically efficient sail shape based on CFD (computational fluid dynamics) calculations (which makes one wonder about junk rigs). It in itself is a difficult feat as CFD only measures a particular shape at a particular time, not over time, as a sailboat's parameters are seldom the same from one moment to the next.
And don't get me wrong, the increased sail area, or anything that can added even a hair of a knot to a sailboat's speed is a fabulous feature for racing boats.
And yes, I have had a discussion with two British sail makers about batten chafe. And yes, someone I know with full battens on his main has had trouble getting it down because an odd angle can jam the (roller bearing) car on the track unless he's in irons (wind +/- ~20 deg).
However, the person asked about a cruising main, and unfortunately any mechanical part does eventually fail; the more its used, the sooner something is likely to happen.
If the object is not long distance or long term cruising but "weekend cruising", then the subject of cost and maintenance is not as important.