Among this rather large crowd, Alpine is popular for just one reason: it's small, and dealing with large images is more annoying, everything else being equal. But alpine and, say, ubuntu, aren't always equal. Those people then find one of the ugliest differences, often related to musl, or something they are using relying on glibc-like behavior, and then get to choose between a hack like this, or much larger images.
As an example my organization was moving everything to alpine, but as part of the switch we found out that some computationally heavy tasks were getting significantly worse performance under alpine than with a glibc-based distro, mainly due to the relatively well documented issues with memory allocation performance. It'd not be surprising that someone finding themselves in this kind of situation ends up just adding glibc to alpine, instead of switching back, or figuring out how to tweak the memory allocator.