" accept that the repertoire is increasing, but some of that repertoire is well suited to accompaniment. "
That is for others to decide as well as you Dick
If you decide to accompany them fine - if chubs won't book you because yo do so - try them without or accept that you won't get their custom.
I sing Shoals of Herring, Dirty old Town, Thirty Foot Trailer and Freeborn Man without accompaniment and I always have done - they work for me.
It's not a matter of a song being "suited" to accompaniment.
Peggy Seeger once said in a lecture, "the way to approach accompaniment is first to decide if a song needs it - if it doesn't, don't".
I can live with that - many venues can too - live with it.
What you do in the privacy of your own home is is your own business - you can sing Lord Gregory with a loofah stuck up your backside, if that's what turns you on.
What you try to impose on clubs is a different matter.
Jim Carroll