H.264 heretofore has been "the standard", so of course most existing devices will have better support for H.264 video than for the not-even-one-year-old WebM. Google and Mozilla are attempting to change that to avoid a repeat of GIF or even MP3.
The argument boils down to "I don't want to put in the effort to switch to the new stuff, and my old stuff likes the old stuff better anyway, so Google is a jerk for trying to make the old stuff less common." And that's just a silly argument that could easily be applied to any number of things in technology, which is a very fast moving field. Things change a lot in this space and it's just one of those things you have to accept.
Google has not obliterated or disabled your H.264 decoders. You are welcome to keep H.264 video around all you want (according, of course, to your license terms with the MPEG-LA). Removing native support from Chrom(e|ium) does not mean that all H.264 video is now magically broken or unplayable. If you are happy with H.264, you are free to continue to use it.