Spain depends on tourism to survive or at least it used to. While there is the regular tourism of tours and the Brit or Gringo coming out to check the sights and the food, there is also what I call Family tourism which is the “americanos” descendants of immigrants visiting the kin they have is Spain.
Back in my younger years and with a strong currency backing us up, we would occasionally take a trip to visit my grandparents and other people and maybe take a month to 45 days. Airlines would offer special packages with those time frames for the whole Latin America, but when the economies started to sag, they were dropped simply because people could no longer afford staying that long. So two and three weeks became the common time to spend.
But having to be locked down for 10 days to be allowed to visit your kin? Why bother traveling at all? It will be cheaper to get somebody a smart phone for the grandparents and use one of those video conferencing apps to say hi and explain why you can’t come visit this year.
Oh well, there is always bailouts from the European Union.