The Corona Cabinet comes up with policy and makes decisions on how to fight the spread of CoronaVirus and imposes, or releases, regulations on the people to that end.

For senior members of the cabinet to not participate in the sessions in somewhat of an abdication of their responsibility to the people of Israel. 

On that much I agree with MK Aryeh Deri (Shas) and others who have spoken up about this over the past several hours.

I think the situation is far worse than just that though.

I believe, unlike most of the Opposition MKs, that Yair Lapid is extremely talented, creative and capable. Whether I agree or not with all his policy and ideas is besides the point. he has been creative and he has proven himself capable. He has put aside his idea to achieve his goals, several times in the past couple of years, and he was the creative architect behind the putting together the current government against all odds. 

The Opposition MKs like to scoff at Lapid for not ever having accomplished anything, for not finishing his bagrut and high school, for serving in the army in a cushy position. It is even somewhat funny that the opposition is so upset that Lapid has not participated in the Corona Cabinet. According to what the Opposition MKs believe, we might be much better off without him there than with him. While the details of all that might be true that does not mean Lapid is not creative or capable. I think he has shown himself to be both, along with having a lot of common sense.

In my opinion, not only is Lapid (and Lieberman?) abdicating responsibility by not participating in these meetings but by his lack of participation he is withholding from the People of Israel the possible creative ideas he might come up with and the common sense for not placing nonsensical restrictions on the citizenry. The Corona Cabinet, and the People of Israel, would likely be much better off with Lapid's participation.