Does that really seem reasonable to you?
Should we assume that social isolation, lack of physical activity, change of habits, being laid off a job and worse health care (preventive for example) have no impact on the number of deaths? That's quite a big assumption.
Yes, but you don't have to give up. If you use critical thinking and assess the competing claims and the strength of the evidence for them, it becomes clear that the evidence for inflated counts is extremely weak, bordering on hearsay, and inconsistent with the overall data, while the evidence for extra uncounted deaths is much broader and stronger and consistent with the overall data, so while there is uncertainty about the true numbers, on net it's reasonable to assume more deaths are being missed than overcounted.