Sam2: According to the Maharsha, you’re understanding of “?? ???? ?????” is a reason for HKBH to rejoice.
Rather he explains that it means someone who can’t learn Torah because he is occupied with other things.
The Iyun Yaakov (in the Ein Yaakov) explains it a different way. He says it means an ?? ???? who is not able to learn but does it anyway and ends up learning with many mistakes is also called bitul Torah.
But I agree that someone who sees in himself that he is not suited for sitting and learning straight for hours is better off working to support mosdos of Torah and being kovei’ah the amount of time they are able to learn straight for Torah.
But the reality is that many of the people who stand around in the coffee room shmoozing all day may unfortunately not be the type to set aside those times. While in kollel they will certainly learn something.
The point is that in kollel you have two types, those who want to learn and those who don’t (I don’t mean that on a subconcious level even the ones who don’t want to learn don’t wish they did, ??? ????- ????? ??????). The ones who want to learn deserve to be supported because they are learning. The ones who don’t want to learn need to be in kollel all the more so that they learn at least something.