I think a middle ground version of this is possible, e.g. instead of letting your battery die, reset the phone to defaults and don’t install anything with the exception of critical communication apps.
Run the rest of the experiment as described for other categories of use.
Some people have family juggling/concerns that requires frequent contact (usually involving children being remote places).
There are many, many, not so strange reasons that someone might need to maintain contact. Thinking it's not possible suggests a very naive perspective.
Run the rest of the experiment as described for other categories of use.