I gave my first student talk in 1971. Of the servant body then, only 1 made it past 1976 as a JW. Those guys had what you are calling "heart." They believed in a brotherhood. The "Truth" was a shared experience. I remember people being happy.
Who is happy now? Most dubs don't even READ the Bible. I told my wife the other day that it was her "sacred duty" to submit to the FDS and she vehemently denied that it was. When I showed her her own underlined copy of the WT study article, she didn't even ACKNOWLEDGE what a statement like that means! They do not even THINK about what their beliefs are. If they did, they'd leave.
I know of no person that is actually JOYOUS in my cong. They are all riddled with problems and waiting on the "end" to solve them all, when all they have to do is take some action on their part to at least ameliorate their situations. And they are aging and dieing, clinging to "Paradise" that never came.
The talks are sterile, forced. The elders are company men. Old people go neglected and lonesome. The Kingdom Hall is a sad, sad place on a Sunday.