You're making the mistake of assuming that the people running those companies care about anything other than their job security, and buying in solutions is the

You're making the mistake of assuming that the people running those companies care about anything other than their job security, and buying in solutions is the best way to have a ready-made scapegoat when things go wrong. The mantra "no-one ever got sacked for buying IBM" still holds, you can just substitute "Oracle", or "Microsoft", or now - apparently - "Crowdstrike".