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"I think they serve a good purpose in establishing a rapport and helping to build a conversation with a new person. Elbow bumps and fist bumps just don't have the same effect."I hope you understand that someone who doesn't want to do handshakes doesn't necessarily get the same effect. Shakes and bumps would actually be misinformation in this case. For example: I never could work out how much pressure to put into a handshake. So nine times out of ten I get a dude on the other end crushing my hand because he either reads me as weak (too little pressure), or as challenging him (too much pressure). And I have no idea how to fix it! So I just don't.
It's the same consideration people like me want from others. We're doing you a kindness by not trying to read your mind through your hand or elbow! You're welcome.
I find that people who prefer nonverbal stuff often overvalue these as signals, while they actually mean nothing coming from me. They want to try and scry my inner state by reading my face or the way I actuate limbs, but they always get it wrong and ignore me pleading with them to listen to my actual words. I'm a very honest and upfront person, so you won't get anything from non-verbal stuff that you can't get from my words. Generally, the only people who get otherwise are people who've made me feel like I need to manage their emotions to secure my own wellbeing, and I try to disassociate with them.
So you can see why I don't find much value in even trying: the people who I want to know understand and come to trust the kindness and truth of my words, and everyone else gets flung into deep space. Life is too short to spend it trying to live up to someone else's expectations.