That depends what you're trying to solve. For a lot of people, they're still gonna need their phone. I don't think "Just use a walkie talkie bro" would read as very helpful advice to the average person.

If, however, you are the sort of person organizing a protest or other similar activity, yes, absolutely, walkie tallies are great. A lot of people who do serious political activism talk about how radio is still the most resilient communication method. Not fool-proof, you definitely need to study up on the limitations, but an invaluable tool to be aware of.

If you are going to a protest as a group, and you have the resources to invest a few hundred bucks, getting a set of walkie-talkies for the group plus a dedicated burner one responsible person to carry (maybe someone who will be in radio range but clear of the actual happenings) is also a solid strategy, but we also shouldn't be acting like "Going as a group" and "spending a few hundred dollars" are prerequisites for being politically active. There need to be solutions for everyone.

Yes. You can get them cheap online and they have a built in “encryption” function that isn’t well protected but might prevent people from listening in realtime.