I agree that debs that were audited and distributed in the package manager are better in that way. I guess my objection is that "curl https://getmic.ro | bash" often gets a hostile reaction here on HN whereas "wget https://github.com/zyedidia/micro/releases/download/v2.0.10/... && dpkg -i micro-2.0.10-amd64.deb" does not.
The latter absolutely should get just as hostile a reaction. The only thing it provides you over the former is that it at least guarantees you that the author went to the trouble of creating a deb.
Actually, it should probably get even more hostile a reaction, since installing it that way usually means you won't get any updates for it. If you absolutely must install software from a (trusted) source other than your distribution, adding a source and then using `apt` is the way to go.