Interesting! Would love to hear more about what you're seeing as the benefits. Seems I'm in the minority so happy to be wrong on this one but it would help me to understand what the overarching goals are.
The feature we're looking at here is meant to send form contents via SMS. You can do what you're describing by launching the default text app with number and message content using the external app feature. I'll try to share a sample form soon.
Agreed with you and @dr_michaelmarks. This is planned for a later release once we know the SMS feature is used and working well.
When you design your form, you can set what the delimiter between field values should be. For example, you could set it to be | so your message would look something like SMS-test|fn|Marie Jo|ln|Bar. The delimiter is escaped for server processing. That is, if the text sent were SMS-test fn Marie\ Jo ln Bar, the server can tell that the space in the first name is part of that answer and not meant to be used as a delimiter.
Again, this feature is meant to sent texts that will be automatically read and used by some kind of server on the other end. I'll share a form to send more free-form texts (that can also include values from the form).