The only SMS I’ve gotten in the last 5 years are the double authentication ones. WhatsApp is the default way of texting in many countries. Outside of the US, when you ask people to stop using WhatsApp, chances are you are asking them to give up texting entirely. Which you must realize is complicated to say the least
Because not everywhere works exactly like the US? Besides the point, if you work at a McDonald’s, they are not going to give you a phone so you can text your manager. If you don’t have a means of communication you are not getting the job.