I gave a college try into doing algebra on the LOB% formula (https://library.fangraphs.com/pitching/lob/) and to try and solve for runs given a league average metric and gave up because laziness. A very rough comparison based on the three qualified pitchers last year with FIPs most similar to Assad (4.29):
Dane Dunning, 4.27 FIP, 77.5% LOB%, 3.70 ERA
Miles Mikolas, 4.27 FIP, 68.9% LOB%, 4.78 ERA
Chris Bassitt, 4.28 FIP, 76.5% LOB%, 3.60 ERA
Conceptualizing the above, it makes sense I think. Dunning's LOB # is roughly 10% higher than Mikolas', given a WHIP of like 1.25 that mostly explains the variance in ERA. The one thing mentioned in that article is that high strikeout guys have shown a tendency to be LOB beaters, which Assad is definitely not. Then again, neither is/was Hendricks, but don't think Assad has his soft contact skills either. Probably talking about a few different things here at this point, no one expects him to be Hendricks and he almost definitely isn't Hendricks, but that's fine.