Can someone explain stroker kits

Most folks don't know the Dodge Brothers supplied engines to Henry Ford for the first automobiles. The bros were building, testing, refining, fossil fueled engines for all sorts of machinery long before the automobile applications. Those engines were designed to run, either idle or under load at a predetermined rpm, forever and ever amen. One of the terms used was "square engine" meaning equal bore and stroke. The farther you move away from those principles in design the shorter the engines lifespan.
Since automobiles with constantly changing rpm and workload is so different from those industrial applications, and since the lifespan of the automobile itself was lessening with every year model,,, much of the engine engineering was tossed out the window. Pandering to the market wants was and still is auto mfgrs path to profit/success.