Everytime I get into this kind of discussion, the answer seems to be "because it makes me feel better". Which is why it's so impossible to actually change someones mind about it and thus we have security "experts" (or worse, non-technical managers) making life miserable for thousands of users.
It really doesn't help that "security expert" is a job title. That means this person is expected to deal with security, not business objectives, and will be blamed for security incidents, not business goals satisfied. If the OP's attitude is cancer, this is what causes it, and it's completely toxic.
My team (20+ SREs/admins) spends roughly 40% of our time complying with either security requests, external audits, internal audits, internal queries from Risk/Security about servers etc. Figure the cost to our business of this (just from our team alone) is roughly $1M per annum. Add in the cost of all the "security" software, add another $2M per annum. Staffing of Risk/Security team is probably another $2M per annum. For all the other workers in IT (250 or so) probably another $3M. For non-IT workers, the added friction is easily 10% of their cost, so $15M. Add it up and you're around $25M.
And it's not even the out of pocket costs, but the opportunity cost. Thank god I work in a business that has regulative moats that prevent real competition.
Cancer is a perfect term for this IT culture.
Big companies are like governments, and when you remove outside market pressure, they become even more so.
Check these boxes to be compliant to make that enterprise sale.
Is it actually more secure? Who cares, insurance will cover us now and the enterprise paid us.