No, that can't be it. Ventilators is a last resort kind of measure, most people under ventilators die either way, so they can't affect numbers much. I suspect Germany is just testing more and earlier than others.
Testing in Germany started very late, but was then increased rapidly.
As of today, Germany has done 1,317,887 tests. The US: 3,029,979 tests, Italy: 1,073,689 tests. (Source: https://www.worldometers.info/coronavirus/) So not exceptionally more than others.