Money. SaaS as a model allowed the service provider to take 100% control over the product and how it may or may not be used. Everything else is downstream from that.

FLOSS killed market for end-device software. Cloud+SaaS neutered FLOSS (the code is running literally out of your reach, so may as well be open and free, for any good that'll do you).

And this does actually connect to the security discussion, because despite the apparent belief that "security" is an unqualified good, it is actually just a mechanism of control, and whether or not it is good for you, depends on who is doing the protecting, and who are they protecting from. Very often these days, that threat actor is you.

Perhaps it would be helpful in these discussions if people mentally swapped "cybersecurity" for "police" or "military" or "humor of bureaucrats with power over you" - then it would be more obvious just how important it is to distinguish when you're being secured vs. you're being secured from, vs. accidentally finding yourself in the gears of the security aparattus.