Earlier quoted context omitted.
In Spain whatsapp is universal and necessary for everything personal and professional. Some hard core committed communists prefer telegram, but even they usually have to have whatsapp too. No one uses signal or even knows what it is.
I am living in spain and I never used whatsapp professionally. I've had a few messages sent by medical clinics to confirm appointment, delivery workers to drop a package or some others pros but if you don't have whatsapp they just call you anyway so it is not necessary. Most people in Spain still rely and prefer voice calls than messages anyway. I believe half the country must still be illiterate as they manage to se…
I am (mostly against my will) in multiple professional and personal Whatsapp groups. Use is constant and daily and unavoidable. It is the principal means of communication in both work and personal settings. Calls are always a second option.
I suspect your experience reflects only partial integration in local culture.