Yes and no. If there are no TGs entered it would be impossible to hear anything - ever. So it' really a matter of logistics rather than policy.
Why waste time scanning a trunked system that you will never hear anything on?
Uniden made the choice many moons ago to not allow the HP based family of scanners to scan in ID Search mode when using the full database. That's why the systems without talkgroups are ignored during the weekly pull, ergo it is de facto
policy. Calling it "logistics" is semantics. The option could've easily been provided to allow ID Search without having to create the system from scratch in a favorites list, or to at least import the systems for advanced users to be able to easily append the site(s) to a favorites list that could then be put into ID Search mode. But no, Uniden wanted to keep them "dumbed down" rather than be progressive.
But whatever, that ship has sailed. Thankfully guys like Bob Aune are much more proactive and forward thinking, as the most recent versions of
@ProScan allow you to edit the full database including putting systems into ID Search mode. Of course that doesn't do any good when it comes to omitted systems, but it's a start at least.
Perhaps you should make a case for at least pulling all compatible trunked systems into the Sentinel database so that advanced users can take advantage of the new ProScan feature, or so they can at least be appended to a favorites list. Too logical? 🙃
