No. We're not a mind-reader. That healer was a stranger to you as you are to them. It's Duty Finder. They cannot possibly know what you're thinking, especially if there are barely words exchanged prior and/or after the Rescue attempt.
You can ask them to not rescue you anymore?
You can tell them that your abilities are interrupted?
You can tell them it's detrimental to you?
Have you even tried to communicate this to your healer at any point? They won't know unless you tell them, they (and us all here) are not a psychic. It also serves as a learning experience for them to use Rescue more effectively in future. A polite request never hurts.
Malicious use of Rescue is another issue, but that happens like once in a blue moon & fairly obvious when it's attempted. You know where to report that to if you think it warrants a support.
The last thing healers need is even more utility stripping, and your request here to put a toggle will 99.99% kill off the button, they might as well not exist at that point.
