I agree. I also remember a few years ago declining a service from my (then) provider that would give people the opportunity to send an email to a special address. A text-to-voice system would translate an incoming email into a voice message.
Another provider was willing to do it the other way - voice-mail to e-mail: if you didn't answer your phone, the caller could leave a voice-message, recorded by the provider. The voice-message would then be send as an email - not text, but a sound file. This was in the pre-adsl era, with pay-per-tick calls. I declined that service as well.
Anyway, after pagers, and later mobile phones, became available, in jobs requiring monitoring boxes/services, I've send text messages to those devices. Most of the time this was done by just sending out an email.
Amusing post on slashdot where guy with somewhat similar question was
by the community ..... but then maybe his business is spammy, and he is certainly foolish to want to be paged on a hike, and he should have other folks backing him up, etc. etc.
those details aside, as hard as it may seem to believe, there are still large areas of the united states still with extremely weak-to-zero cell coverage. not large population areas of course, but large pieces of countryside. (nice places to live and work, btw, because of the lack of population, imho!)
so while email->text->cell is a nice option, it doesn't work for me, at least for now, due to ruralness....