I can think of three who could very easily put on a mask and get on the Senate floor and vote which makes me think that they are "self-quarantining" so that they don't have to vote. Cruz/Lee/Romney - how convenient.
You can think whatever you want; it is after all a free country.
But Senator Ted Cruz is an honorable man who has, after all, supported President Trump. And he has, after all, been trying to hold the opposition accountable. Remember President Reagan’s admonition on the virtues of placing the focus on those who are the /most/ accountable for the present situation, which is NOT the Republican senate?
https://www.reagan.com/ronald-reagan-the-11th-commandment