what's really going on here...
Perhaps you are disillusioned with your current job and should consider a change...or a least seek a change in working conditions.
As for my view, usually you get out of a job what you put into it. It appears that some professional pilots do not interact with their passengers. You could try greeting the so called SLF at the end of a flight as they are ultimately paying you - and relying on you performing the task skilfully. Most will be grateful for the service you are providing. If this task could be performed reliably by a computer you wouldn't be there; economics wouldn't allow it.
To do a job - most jobs - is not difficult; to do a job well takes considerable effort and practice. Keep at it !