It did and while it is a pretty extreme example, we have to remember that we're still early enough in the year for average based numbers to be pretty volatile. Ohtani had 12 major league starts priot to this year (a number he's already doubled) so with only 3 months of pitching regularly in the bigs, we don't really know what he is as a pitcher yet. So both 2.5 and 3.3 should be taken with a grain of salt at this point.
For that matter, 0.69 probably should too. As spectacular as deGrom has been, he's in a position where even an outing with 9 innings of 1 run ball raises his era. Throw in a couple more games with 2 runs or even just 1 actually bad game and the sub-1 era is likely long gone.