Do you also check your grocery stores preparedness for fire for the same reason? Or your local banks preparedness for robbery? Hopefully not.
In business all decisions are made based on a risk tradeoff. Like people it never has enough money to do everything it wants.
Not all companies are started 12 months ago and hence cannot (by definition) do this right "from the beginning".
Also some businesses have a requirement (bound by law) and a wish (bound by corporate secrets) of not disclosing too much information. That cannot be easily automated.
Also, all the costs of that just goes to the other customers, so thank you.
Btw. I am not pro facebook(meta)/amazon/spamhosts/ai-driven web3.0 sell-your-customers-data... etc.. I talk about regular, honest businesses that two decades ago had no web presence but have it now and for some reason or another need to handle your data..