The Be95 (baby Baron) is a pretty forgiving aircraft while both are turning but can get a bit of a handful when one goes on holiday early in the flight.
I can quite understand owners being a bit reluctant to hire to low time pilots without IFR since they can overload people with little exposure to twins pretty quickly.
I don't think that you HAVE to be IFR rated to fly them, but the rating does give a pilot a mind set that is consistent with the level of machinery and planning it deserves.
A B55 would be better and worse unfortunately. The extra power helps when one quits, but conversely, it can turn nasty if the speed drops below the blue too much.
Also, the higher cruise speed can get you behind the aircraft that much easier if things get sticky in the wx department.
Both aircraft lend themselves to IFR, if only because as with most low-wing twins, the vis for nav and obstacle clearance is pretty awful.
At least there, the P68 is much better even if it's a bucket of lard on one donk.
I suspect too that most owner operators will have insurance requirements on the beech twins that dictate 250 hrs or IFR as a minimum.
Sorry about that.