Therapists can only do the best for their clients by looking after themselves and putting themselves first. He is practising self care which he needs to do so that in the future he can continue to be a good therapist.
Yes it’s painful and it hurts, but we can’t expect our therapists to always be on call 24/7.
He probably underestimated how hard his recovery was going to be which is why he had to change what he had said.
I think the important thing is not to focus on how abandoned and hurt you feel but how you can also practise some self care and help to look after yourself whilst your T is not accessible.