Not even remotely true except that in both cases you change a number in some text file. If you do it in source code, you have to get the source code, you have to identify the correct line[s], you need a build environment, you might have to reinstall the new version after the build. And on top of this you want to involve a language model in this. The difference in complexity, effort, and resource consumption is orders of magnitude. And we are not even considering that you will have to go through this for each future version to keep your modification included. This is an insane way to change a font size.