On 2) NO! I'm not busting down my own door to get into my property. And if I have to, I'm evicting you.

On your greater point, there are a million ways to skin a Roman senator. There are alternatives that don't require a smartlock and if an otherwise great tenant (or applicant) really pressed the issue, perhaps I'd go with another one. In the absence of that, I'll go with what's easiest and sensibly secure (which, by the by, a smartlock is).