The true touch free car washes that just use high pressure water jets (e.g. laserwash) tend to use harsher chemicals to get the same clean; so those may end up stripping more wax compared to a wash that touches your car. The final steps that you pay extra for may add back a little (cheap) wax though.
That being said you shouldn't have "wax" anymore but sealants and other synthetic polymers that will hold up better, before any carnauba layers.
So yes, if you spent a lot of time waxing, and your choice is between a laserwash and a (well-maintained) soft-touch facility, you should pick the soft-touch as it won't strip the wax, even if it may have a few micro abrasions.