I agree- that's the correct assessment. Conventional practices (seeds and cuttings) have been used for many years, with great success. It would take a particularly large operation to demand a tissue culture facility, but TC is used even for ornamental crops, such as those found at the hardware store (Venus' flytraps), orchids at Trader Joe's, and the majority of poinsettias are tissue cultured. Of course, even a large poinsettia at the store costs less than a single, small rooted cutting of, say, AK-47 (as gauged by Craigslist ads in California, where there is a substantial trade in propagules).
So, if ornamentals can be produced for sale for under $1 on the wholesale market, one imagines what can be done with cannabis. However, due to scaling issues, it would be unlikely that cannabis would ever drop to such a low price.
However, I would like to avail my services in the event that a large-scale producer were to require such, or that a particularly determined grower would call for an effort to have polyploids produced, that sort of thing. Just another day at the office.