Or even more reasonably asking “why does a for profit, publicly traded company give this out for free? Am I the product” we know how how FOSS are funded like linux distros, libre office, Apache, blender, gimp, etc. through donations, merch, support subscriptions. Google is selling your info. Good enough as any reason to not use their products. And how many different devices are you reasonably working on throughout the day? Word processor files are tiny.