This isn't the named senators telling people to not use VPNs, this is the senators saying they are worried US citizens are being surveiled as if they are foreign threats due to VPN use.

They are then asking the person in charge of the people doing that surveiling to change their guidance to reflect that reality, as they currently reccomend VPN use.

There won't be a response, and then I would assume the named legislators will propose legislation to patch this problem which will not be read or passed by any other politicians to the right of these fairly progressive legislators.

At worst its political theater, at best an attempt to protect VPN use, realistically something closer to the former, and none of the outcomes are these senators trying to take muh vpns